Programming Forums > Application Development > C

squirrel · Jun 23rd, 2006, 3:44 AM

Hi,

I have a program which is hard coded, I need to enter a value(n2 in the below code) in the program, and the program processes the file according to the value n2.

how I compile now is as follows:
cc -o test testprog.c
./test [filename]

(Toggle Plain Text)

	if((data[0]=='8')&&(data[1]=='2'))
		{
			memcpy(&l1,data+2,sizeof(int));
			memcpy(&l2,data+6,sizeof(int));
			memcpy(&n1,data+13,sizeof(int));
			memcpy(&n2,data+17,sizeof(int));
			memcpy(&n3,data+21,sizeof(int));
/*			if(n2==81798)*/
/*			if(n2==82060)*/
/*			if(n2==82169)*/
/*			if(n2==1795)   */
/*			if (n2 == 1854) */
/*                      if (n2 == 1830)*/ 
			if (n2 == 41388) 
			{
				printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3);
			}
			else
			{
				fwrite(data,128,1,fp_out);
			}
			iSin++;
		}

What I need to do is, modify the program in such a way that, the value n2 can be given as an argument at command line.

Can anyone please help me with this?

thanx
Squirrel

mrynit · Jun 23rd, 2006, 4:06 AM

i dont do C but can you just ask for user input and use scanf() to get it?? and the code you posted, is that just a snip of the total code? cause you need some more stuff for it to compile right.

squirrel · Jun 23rd, 2006, 4:15 AM

Yes, It is the snip of the total code.
Iam new to programing and not knowing how to modify.

squirrel · Jun 23rd, 2006, 4:46 AM

Here is the full code:

(Toggle Plain Text)

#include  "check_2ndkj.h"
int CS_write();

main(int argc,char *argv[])
{
int i_FValue;
FILE	*fp_MYFILE;
	if(argc != 2)
	{
		printf("\tErr -> command line\n");
		printf("\t MYFileName\n");
		exit(NO);
	}
	else
	{
		printf("\tCommand accepted  -> check_K source %s\n",argv[1]);
	}

/*----------------------------------------------------------*/
/*				fopen	                    */
/*----------------------------------------------------------*/
	if(NULL==(fp_MYFILE=fopen(argv[1],"r")))
	{
		printf("file open Err! -> %s\n",argv[1]);
		exit(NO);
	}

/*----------------------------------------------------------*/
/*CS_write()			        */
/*----------------------------------------------------------*/
	i_FValue	=	CS_write(fp_MYFILE);
	if(i_FValue==NO)
	{
		printf("\tErr CS_write( )\n");
		exit(NO);
	}

/*----------------------------------------------------------*/
/*			fclose	                                */
/*----------------------------------------------------------*/
	fclose(fp_MYFILE);
}

/*----------------------------------------------------------*/
/*		CS_write( )	        */
/*----------------------------------------------------------*/
CS_write(fp_MYFILE)

FILE	*fp_MYFILE;
{
unsigned char	data[128];
int i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum;
int i_cnt;
int n1,l1,n2,l2,n3;
int iSin,iIpo;
int i_1;
FILE *fp_out;

	if(NULL==(fp_out=fopen("Uxxxxxx","w")))
	{
		printf("file open Err! -> Uxxxxxx\n");
		exit(NO);
	}
	printf("\tCS_write_Sin( )\n");
	iSin=0;
	iIpo=0;

/*------------------*/
/*  store    */
/*------------------*/
	fread(data,sizeof(data),1,fp_MYFILE);
	memcpy(&i_KjNum,data+91,sizeof(i_KjNum));
	memcpy(&i_NetworkNum,data+95,sizeof(i_NetworkNum));
	memcpy(&i_PolygonNum,data+99,sizeof(i_PolygonNum));
	memcpy(&i_TNum,data+103,sizeof(i_TNum));
	memcpy(&i_ZNum,data+107,sizeof(i_ZNum));
	memcpy(&i_SNum,data+111,sizeof(i_SNum));
	memcpy(&i_KNum,data+115,sizeof(i_KNum));

	i_1=i_KNum-1;
	memcpy(&(data[115]),&i_1,sizeof(i_KNum));

	fwrite(data,128,1,fp_out);

/*check*/
printf("%d %d %d %d %d %d %d \n", i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum);

for(i_cnt=0;i_cnt<i_KjNum+i_NetworkNum+i_PolygonNum+i_TNum+i_ZNum+i_SNum;i_cnt++)
	{
		memset(data,0x00,128);
		fread(data,sizeof(data),1,fp_MYFILE);
		fwrite(data,128,1,fp_out);
	}

	for(i_cnt=0;i_cnt<i_KNum;i_cnt++)
	{
		fread(data,sizeof(data),1,fp_MYFILE);
		if((data[0]=='8')&&(data[1]=='2'))
		{
			memcpy(&l1,data+2,sizeof(int));
			memcpy(&l2,data+6,sizeof(int));
			memcpy(&n1,data+13,sizeof(int));
			memcpy(&n2,data+17,sizeof(int));
			memcpy(&n3,data+21,sizeof(int));
/*			if (n2 == 1854) */
/*			if (n2 == 1830)*/ 
			if (n2 == 41388	
{
			
printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3);
			}
			else
			{
				fwrite(data,128,1,fp_out);
			}
			iSin++;
		}
		if((data[0]=='8')&&(data[1]=='1'))
		{
			fwrite(data,128,1,fp_out);
			iIpo++;
		}
	}
	
	printf("\t iIpo [%d] iSin [%d]\n",iIpo,iSin);
	fclose(fp_out);
	return(OK);
}

#include  "check_2ndkj.h"
int CS_write();

main(int argc,char *argv[])
{
int i_FValue;
FILE	*fp_MYFILE;
	if(argc != 2)
	{
		printf("\tErr -> command line\n");
		printf("\t MYFileName\n");
		exit(NO);
	}
	else
	{
		printf("\tCommand accepted  -> check_K source %s\n",argv[1]);
	}

/*----------------------------------------------------------*/
/*				fopen	                    */
/*----------------------------------------------------------*/
	if(NULL==(fp_MYFILE=fopen(argv[1],"r")))
	{
		printf("file open Err! -> %s\n",argv[1]);
		exit(NO);
	}

/*----------------------------------------------------------*/
/*CS_write()			        */
/*----------------------------------------------------------*/
	i_FValue	=	CS_write(fp_MYFILE);
	if(i_FValue==NO)
	{
		printf("\tErr CS_write( )\n");
		exit(NO);
	}

/*----------------------------------------------------------*/
/*			fclose	                                */
/*----------------------------------------------------------*/
	fclose(fp_MYFILE);
}

/*----------------------------------------------------------*/
/*		CS_write( )	        */
/*----------------------------------------------------------*/
CS_write(fp_MYFILE)

FILE	*fp_MYFILE;
{
unsigned char	data[128];
int i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum;
int i_cnt;
int n1,l1,n2,l2,n3;
int iSin,iIpo;
int i_1;
FILE *fp_out;

	if(NULL==(fp_out=fopen("Uxxxxxx","w")))
	{
		printf("file open Err! -> Uxxxxxx\n");
		exit(NO);
	}
	printf("\tCS_write_Sin( )\n");
	iSin=0;
	iIpo=0;

/*------------------*/
/*  store    */
/*------------------*/
	fread(data,sizeof(data),1,fp_MYFILE);
	memcpy(&i_KjNum,data+91,sizeof(i_KjNum));
	memcpy(&i_NetworkNum,data+95,sizeof(i_NetworkNum));
	memcpy(&i_PolygonNum,data+99,sizeof(i_PolygonNum));
	memcpy(&i_TNum,data+103,sizeof(i_TNum));
	memcpy(&i_ZNum,data+107,sizeof(i_ZNum));
	memcpy(&i_SNum,data+111,sizeof(i_SNum));
	memcpy(&i_KNum,data+115,sizeof(i_KNum));

	i_1=i_KNum-1;
	memcpy(&(data[115]),&i_1,sizeof(i_KNum));

	fwrite(data,128,1,fp_out);

/*check*/
printf("%d %d %d %d %d %d %d \n", i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum);

for(i_cnt=0;i_cnt<i_KjNum+i_NetworkNum+i_PolygonNum+i_TNum+i_ZNum+i_SNum;i_cnt++)
	{
		memset(data,0x00,128);
		fread(data,sizeof(data),1,fp_MYFILE);
		fwrite(data,128,1,fp_out);
	}

	for(i_cnt=0;i_cnt<i_KNum;i_cnt++)
	{
		fread(data,sizeof(data),1,fp_MYFILE);
		if((data[0]=='8')&&(data[1]=='2'))
		{
			memcpy(&l1,data+2,sizeof(int));
			memcpy(&l2,data+6,sizeof(int));
			memcpy(&n1,data+13,sizeof(int));
			memcpy(&n2,data+17,sizeof(int));
			memcpy(&n3,data+21,sizeof(int));
/*			if (n2 == 1854) */
/*			if (n2 == 1830)*/ 
			if (n2 == 41388	
{
			
printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3);
			}
			else
			{
				fwrite(data,128,1,fp_out);
			}
			iSin++;
		}
		if((data[0]=='8')&&(data[1]=='1'))
		{
			fwrite(data,128,1,fp_out);
			iIpo++;
		}
	}
	
	printf("\t iIpo [%d] iSin [%d]\n",iIpo,iSin);
	fclose(fp_out);
	return(OK);
}

DaWei · Jun 23rd, 2006, 7:36 AM

(Toggle Plain Text)

main(int argc,char *argv[])

Argc contains the number of items on the command line, including the command. Argv is an array of C-strings, one for each item. Argv [0] is the command, argv [1] is the first argument, argv [2] is the second argument, etc.

InfoGeek · Jun 23rd, 2006, 7:37 AM

(Toggle Plain Text)

sscanf(argv[1],"%d",&n2);

HTH.

DaWei · Jun 23rd, 2006, 7:40 AM

Now, Info, I can't believe you recommend that schlocky code. What if the user doesn't put a number there?

InfoGeek · Jun 23rd, 2006, 8:01 AM

Sorry for that, Dawei.
I'd be more careful while giving advice next time.

(Toggle Plain Text)

if(sscanf(argv[1],"%d",&n2)!=1) 
  Uhoh(TroubleInRiverCity);

DaWei · Jun 23rd, 2006, 8:05 AM

LOL, attaboy

.

squirrel · Jun 23rd, 2006, 9:26 AM

Wat do I need to add or change at the IF loop of n2 ?? Can u please explain me a bit more clearly?? Sorry for the trouble!!

Jun 23rd, 2006, 3:44 AM	#1
squirrel Newbie Join Date: Jun 2006 Posts: 11 Rep Power: 0	compile program with command line arguments Hi, I have a program which is hard coded, I need to enter a value(n2 in the below code) in the program, and the program processes the file according to the value n2. how I compile now is as follows: cc -o test testprog.c ./test [filename] (Toggle Plain Text) if((data[0]=='8')&&(data[1]=='2')) { memcpy(&l1,data+2,sizeof(int)); memcpy(&l2,data+6,sizeof(int)); memcpy(&n1,data+13,sizeof(int)); memcpy(&n2,data+17,sizeof(int)); memcpy(&n3,data+21,sizeof(int)); /* if(n2==81798)/ / if(n2==82060)/ / if(n2==82169)/ / if(n2==1795) / / if (n2 == 1854) / / if (n2 == 1830)/ if (n2 == 41388) { printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3); } else { fwrite(data,128,1,fp_out); } iSin++; } if((data[0]=='8')&&(data[1]=='2')) { memcpy(&l1,data+2,sizeof(int)); memcpy(&l2,data+6,sizeof(int)); memcpy(&n1,data+13,sizeof(int)); memcpy(&n2,data+17,sizeof(int)); memcpy(&n3,data+21,sizeof(int)); / if(n2==81798)/ / if(n2==82060)/ / if(n2==82169)/ / if(n2==1795) / / if (n2 == 1854) / / if (n2 == 1830)/ if (n2 == 41388) { printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3); } else { fwrite(data,128,1,fp_out); } iSin++; } What I need to do is, modify the program in such a way that, the value n2 can be given as an argument at command line. Can anyone please help me with this? thanx Squirrel Last edited by squirrel; Jun 23rd, 2006 at 3:55 AM.*

Jun 23rd, 2006, 4:06 AM	#2
mrynit Hobbyist Programmer Join Date: Mar 2006 Location: WA, USA Posts: 342 Rep Power: 3	i dont do C but can you just ask for user input and use scanf() to get it?? and the code you posted, is that just a snip of the total code? cause you need some more stuff for it to compile right. __________________ i dont know much about programming but i try to help

Jun 23rd, 2006, 7:36 AM	#5
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	(Toggle Plain Text) main(int argc,char *argv[]) main(int argc,char argv[]) Argc contains the number of items on the command line, including the command. Argv is an array of C-strings, one for each item. Argv [0] is the command, argv [1] is the first argument, argv [2] is the second argument, etc. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers*

Jun 23rd, 2006, 7:37 AM	#6
InfoGeek Professional Programmer Join Date: Jun 2005 Location: India, The great. Posts: 435 Rep Power: 4	(Toggle Plain Text) sscanf(argv[1],"%d",&n2); sscanf(argv[1],"%d",&n2); HTH. __________________ PFO - My daily dose of technology.

Jun 23rd, 2006, 7:40 AM	#7
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Now, Info, I can't believe you recommend that schlocky code. What if the user doesn't put a number there? __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 23rd, 2006, 4:15 AM	#3
squirrel Newbie Join Date: Jun 2006 Posts: 11 Rep Power: 0	Yes, It is the snip of the total code. Iam new to programing and not knowing how to modify.

Jun 23rd, 2006, 4:46 AM	#4
squirrel Newbie Join Date: Jun 2006 Posts: 11 Rep Power: 0	Here is the full code: (Toggle Plain Text) #include "check_2ndkj.h" int CS_write(); main(int argc,char argv[]) { int i_FValue; FILE fp_MYFILE; if(argc != 2) { printf("\tErr -> command line\n"); printf("\t MYFileName\n"); exit(NO); } else { printf("\tCommand accepted -> check_K source %s\n",argv[1]); } /----------------------------------------------------------/ /* fopen / /----------------------------------------------------------/ if(NULL==(fp_MYFILE=fopen(argv[1],"r"))) { printf("file open Err! -> %s\n",argv[1]); exit(NO); } /----------------------------------------------------------/ /CS_write() / /----------------------------------------------------------/ i_FValue = CS_write(fp_MYFILE); if(i_FValue==NO) { printf("\tErr CS_write( )\n"); exit(NO); } /----------------------------------------------------------/ / fclose / /----------------------------------------------------------/ fclose(fp_MYFILE); } /----------------------------------------------------------/ / CS_write( ) / /----------------------------------------------------------/ CS_write(fp_MYFILE) FILE fp_MYFILE; { unsigned char data[128]; int i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum; int i_cnt; int n1,l1,n2,l2,n3; int iSin,iIpo; int i_1; FILE fp_out; if(NULL==(fp_out=fopen("Uxxxxxx","w"))) { printf("file open Err! -> Uxxxxxx\n"); exit(NO); } printf("\tCS_write_Sin( )\n"); iSin=0; iIpo=0; /------------------/ / store / /------------------/ fread(data,sizeof(data),1,fp_MYFILE); memcpy(&i_KjNum,data+91,sizeof(i_KjNum)); memcpy(&i_NetworkNum,data+95,sizeof(i_NetworkNum)); memcpy(&i_PolygonNum,data+99,sizeof(i_PolygonNum)); memcpy(&i_TNum,data+103,sizeof(i_TNum)); memcpy(&i_ZNum,data+107,sizeof(i_ZNum)); memcpy(&i_SNum,data+111,sizeof(i_SNum)); memcpy(&i_KNum,data+115,sizeof(i_KNum)); i_1=i_KNum-1; memcpy(&(data[115]),&i_1,sizeof(i_KNum)); fwrite(data,128,1,fp_out); /check/ printf("%d %d %d %d %d %d %d \n", i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum); for(i_cnt=0;i_cnt<i_KjNum+i_NetworkNum+i_PolygonNum+i_TNum+i_ZNum+i_SNum;i_cnt++) { memset(data,0x00,128); fread(data,sizeof(data),1,fp_MYFILE); fwrite(data,128,1,fp_out); } for(i_cnt=0;i_cnt<i_KNum;i_cnt++) { fread(data,sizeof(data),1,fp_MYFILE); if((data[0]=='8')&&(data[1]=='2')) { memcpy(&l1,data+2,sizeof(int)); memcpy(&l2,data+6,sizeof(int)); memcpy(&n1,data+13,sizeof(int)); memcpy(&n2,data+17,sizeof(int)); memcpy(&n3,data+21,sizeof(int)); / if (n2 == 1854) / / if (n2 == 1830)/ if (n2 == 41388 { printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3); } else { fwrite(data,128,1,fp_out); } iSin++; } if((data[0]=='8')&&(data[1]=='1')) { fwrite(data,128,1,fp_out); iIpo++; } } printf("\t iIpo [%d] iSin [%d]\n",iIpo,iSin); fclose(fp_out); return(OK); } #include "check_2ndkj.h" int CS_write(); main(int argc,char argv[]) { int i_FValue; FILE fp_MYFILE; if(argc != 2) { printf("\tErr -> command line\n"); printf("\t MYFileName\n"); exit(NO); } else { printf("\tCommand accepted -> check_K source %s\n",argv[1]); } /----------------------------------------------------------/ / fopen / /----------------------------------------------------------/ if(NULL==(fp_MYFILE=fopen(argv[1],"r"))) { printf("file open Err! -> %s\n",argv[1]); exit(NO); } /----------------------------------------------------------/ /CS_write() / /----------------------------------------------------------/ i_FValue = CS_write(fp_MYFILE); if(i_FValue==NO) { printf("\tErr CS_write( )\n"); exit(NO); } /----------------------------------------------------------/ / fclose / /----------------------------------------------------------/ fclose(fp_MYFILE); } /----------------------------------------------------------/ / CS_write( ) / /----------------------------------------------------------/ CS_write(fp_MYFILE) FILE fp_MYFILE; { unsigned char data[128]; int i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum; int i_cnt; int n1,l1,n2,l2,n3; int iSin,iIpo; int i_1; FILE fp_out; if(NULL==(fp_out=fopen("Uxxxxxx","w"))) { printf("file open Err! -> Uxxxxxx\n"); exit(NO); } printf("\tCS_write_Sin( )\n"); iSin=0; iIpo=0; /------------------/ / store / /------------------/ fread(data,sizeof(data),1,fp_MYFILE); memcpy(&i_KjNum,data+91,sizeof(i_KjNum)); memcpy(&i_NetworkNum,data+95,sizeof(i_NetworkNum)); memcpy(&i_PolygonNum,data+99,sizeof(i_PolygonNum)); memcpy(&i_TNum,data+103,sizeof(i_TNum)); memcpy(&i_ZNum,data+107,sizeof(i_ZNum)); memcpy(&i_SNum,data+111,sizeof(i_SNum)); memcpy(&i_KNum,data+115,sizeof(i_KNum)); i_1=i_KNum-1; memcpy(&(data[115]),&i_1,sizeof(i_KNum)); fwrite(data,128,1,fp_out); /check/ printf("%d %d %d %d %d %d %d \n", i_KjNum,i_NetworkNum,i_PolygonNum,i_TNum,i_ZNum,i_SNum,i_KNum); for(i_cnt=0;i_cnt<i_KjNum+i_NetworkNum+i_PolygonNum+i_TNum+i_ZNum+i_SNum;i_cnt++) { memset(data,0x00,128); fread(data,sizeof(data),1,fp_MYFILE); fwrite(data,128,1,fp_out); } for(i_cnt=0;i_cnt<i_KNum;i_cnt++) { fread(data,sizeof(data),1,fp_MYFILE); if((data[0]=='8')&&(data[1]=='2')) { memcpy(&l1,data+2,sizeof(int)); memcpy(&l2,data+6,sizeof(int)); memcpy(&n1,data+13,sizeof(int)); memcpy(&n2,data+17,sizeof(int)); memcpy(&n3,data+21,sizeof(int)); / if (n2 == 1854) / / if (n2 == 1830)*/ if (n2 == 41388 { printf("\t<Sin> 1stNode [%d] 1stLink [%d] 2ndNode [%d] 2ndLink [%d] 3rdNode [%d]\n",n1,l1,n2,l2,n3); } else { fwrite(data,128,1,fp_out); } iSin++; } if((data[0]=='8')&&(data[1]=='1')) { fwrite(data,128,1,fp_out); iIpo++; } } printf("\t iIpo [%d] iSin [%d]\n",iIpo,iSin); fclose(fp_out); return(OK); }

Jun 23rd, 2006, 8:01 AM	#8
InfoGeek Professional Programmer Join Date: Jun 2005 Location: India, The great. Posts: 435 Rep Power: 4	Sorry for that, Dawei. I'd be more careful while giving advice next time. (Toggle Plain Text) if(sscanf(argv[1],"%d",&n2)!=1) Uhoh(TroubleInRiverCity); if(sscanf(argv[1],"%d",&n2)!=1) Uhoh(TroubleInRiverCity); __________________ PFO - My daily dose of technology.

Jun 23rd, 2006, 8:05 AM	#9
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	LOL, attaboy . __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 23rd, 2006, 9:26 AM	#10
squirrel Newbie Join Date: Jun 2006 Posts: 11 Rep Power: 0	Wat do I need to add or change at the IF loop of n2 ?? Can u please explain me a bit more clearly?? Sorry for the trouble!!

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Programming Forums > Application Development > C

compile program with command line arguments