Programming Forums > Application Development > C

beginnerCCC · Oct 1st, 2006, 9:11 AM

now i have this code.
but i can only read the first column.
what should i do to read the rest?

#include <stdio.h>
#include <string.h>

#define ROW 762
#define COL 7


typedef struct{
	int day;
	char month[3];
	int year;
	}DATE;
	
typedef struct{
	char filename[20];
	DATE date;
	float third;
	float forth;
	float fifth;
	float ClosePrice;
	float seventh;
	}BHP;

int main(void)
{
	FILE* infile;
	 char buffer[ROW];
	
	int i,j,k;
/*	  struct BHP result[100];*/
	char delims[] = ",";
    char *result = NULL;
	
	
	infile = fopen("bhp.csv","r");
	if (infile == NULL)
	{
		printf("Error opening file!!!\n");
		return 0;
	}
for(i=0;i<ROW;++i)
	{
	fgets(buffer,ROW,infile);
	}

/* spliting the columns*/
 
for(i=0;i<ROW;++i)
	for(j=0;j<COL;++j)
{
	result = strtok(buffer, delims );
	
	/*fscanf(infile,"%f",&result);
	  while(!feof(infile))*/
		{
			printf("result is \"%s\"\n",result);
		}
}

free(buffer);
fclose(infile);
	







	return 0;
}

DaWei · Oct 1st, 2006, 10:26 AM

You need to start paying attention. ROW, which happens to be the number of lines in this one particular file, has nothing to do with the maximum number of characters you want to read in one fgets operation. Read the documentation on fgets. ROW, as a number, will probably work very well in that job, but that job has nothing to do with the number of rows (records, lines) in the file. If you were confused before, you are confusing yourself worse, now. You are then reading ROW lines, one at a time, each one destroying the one from before. You're not checking for success. A file with fewer than ROW lines will kick you square in the cojones. You still don't seem to have a concept of the difference between a record and a field. In short, you need to get serious. We help with homework here, we don't DO homework here (it's against the rules). Read my previous post concerning records and fields. If you don't get that, you can't begin.

Oct 1st, 2006, 9:11 AM	#21
beginnerCCC Newbie Join Date: Sep 2006 Posts: 29 Rep Power: 0	now i have this code. but i can only read the first column. what should i do to read the rest? (Toggle Plain Text) #include <stdio.h> #include <string.h> #define ROW 762 #define COL 7 typedef struct{ int day; char month[3]; int year; }DATE; typedef struct{ char filename[20]; DATE date; float third; float forth; float fifth; float ClosePrice; float seventh; }BHP; int main(void) { FILE* infile; char buffer[ROW]; int i,j,k; /* struct BHP result[100];/ char delims[] = ","; char result = NULL; infile = fopen("bhp.csv","r"); if (infile == NULL) { printf("Error opening file!!!\n"); return 0; } for(i=0;i<ROW;++i) { fgets(buffer,ROW,infile); } /* spliting the columns/ for(i=0;i<ROW;++i) for(j=0;j<COL;++j) { result = strtok(buffer, delims ); /fscanf(infile,"%f",&result); while(!feof(infile))/ { printf("result is \"%s\"\n",result); } } free(buffer); fclose(infile); return 0; } #include <stdio.h> #include <string.h> #define ROW 762 #define COL 7 typedef struct{ int day; char month[3]; int year; }DATE; typedef struct{ char filename[20]; DATE date; float third; float forth; float fifth; float ClosePrice; float seventh; }BHP; int main(void) { FILE infile; char buffer[ROW]; int i,j,k; /* struct BHP result[100];/ char delims[] = ","; char result = NULL; infile = fopen("bhp.csv","r"); if (infile == NULL) { printf("Error opening file!!!\n"); return 0; } for(i=0;i<ROW;++i) { fgets(buffer,ROW,infile); } /* spliting the columns/ for(i=0;i<ROW;++i) for(j=0;j<COL;++j) { result = strtok(buffer, delims ); /fscanf(infile,"%f",&result); while(!feof(infile))*/ { printf("result is \"%s\"\n",result); } } free(buffer); fclose(infile); return 0; }

Oct 1st, 2006, 10:26 AM	#22
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	You need to start paying attention. ROW, which happens to be the number of lines in this one particular file, has nothing to do with the maximum number of characters you want to read in one fgets operation. Read the documentation on fgets. ROW, as a number, will probably work very well in that job, but that job has nothing to do with the number of rows (records, lines) in the file. If you were confused before, you are confusing yourself worse, now. You are then reading ROW lines, one at a time, each one destroying the one from before. You're not checking for success. A file with fewer than ROW lines will kick you square in the cojones. You still don't seem to have a concept of the difference between a record and a field. In short, you need to get serious. We help with homework here, we don't DO homework here (it's against the rules). Read my previous post concerning records and fields. If you don't get that, you can't begin. __________________ 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

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Programming Forums > Application Development > C

csv file. what is better a 2D or a 3D array?