Programming Forums > Application Development > C

nannu · May 5th, 2008, 5:56 PM

Fairly new to programming. Any advice would be appreciated.
Thanks in advance

OK, I am using Microsoft Visual C++ for all of my C++ programming. We have done some very basic code just to get an overview of what is going on. I have found some code below, this code is pretty long compared to what we have done as we skimmed over the programs. But in MS Visual C++ how would I put this into the program.

THREADS:

 c Syntax (Toggle Plain Text) 
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
 
int myglobal;
 
void *thread_function(void *arg) {
int i,j;
for ( i=0; i<20; i++ ) {
j=myglobal;
j=j+1;
printf(".");
fflush(stdout);
sleep(1);
myglobal=j;
}
return NULL;
}
 
int main(void) {
 
pthread_t mythread;
int i;
 
if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
printf("error creating thread.");
abort();
}
 
for ( i=0; i<20; i++) {
myglobal=myglobal+1;
printf("o");
fflush(stdout);
sleep(1);
}
 
if ( pthread_join ( mythread, NULL ) ) {
printf("error joining thread.");
abort();
}
 
printf("\nmyglobal equals %d\n",myglobal);
 
exit(0);
}
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>

int myglobal;

void *thread_function(void *arg) {
int i,j;
for ( i=0; i<20; i++ ) {
j=myglobal;
j=j+1;
printf(".");
fflush(stdout);
sleep(1);
myglobal=j;
}
return NULL;
}

int main(void) {

pthread_t mythread;
int i;

if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
printf("error creating thread.");
abort();
}

for ( i=0; i<20; i++) {
myglobal=myglobal+1;
printf("o");
fflush(stdout);
sleep(1);
}

if ( pthread_join ( mythread, NULL ) ) {
printf("error joining thread.");
abort();
}

printf("\nmyglobal equals %d\n",myglobal);

exit(0);
}

OK what I am doing is when I open up the project I create the work space and give it a name. Now when I copy this code into the project and click compile, I get 1 error saying "Cannot open include file: 'pthread.h': No such file or directory". Now I know that in C++ you can have are .cpp file and a .h file. Now how can I prevent this from happening. I tried changing it up a little. I created a header file and pasted this part in it:

 c Syntax (Toggle Plain Text) 
#include <iostream>
//#include <FK2008Sample2.h>
 
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <FK2008Sample>
int myglobal;
 
void *thread_function(void *arg) {
int i,j;
for ( i=0; i<20; i++ ) {
j=myglobal;
j=j+1;
printf(".");
fflush(stdout);
sleep(1);
myglobal=j;
}
return NULL;
}
#include <iostream>
//#include <FK2008Sample2.h>

#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <FK2008Sample>
int myglobal;

void *thread_function(void *arg) {
int i,j;
for ( i=0; i<20; i++ ) {
j=myglobal;
j=j+1;
printf(".");
fflush(stdout);
sleep(1);
myglobal=j;
}
return NULL;
}

and then I created a .cpp file and pasted this in it:
using namespace std;

 c Syntax (Toggle Plain Text) 
int main(void) {
 
pthread_t mythread;
int i;
 
if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
printf("error creating thread.");
abort();
}
 
for ( i=0; i<20; i++) {
myglobal=myglobal+1;
printf("o");
fflush(stdout);
sleep(1);
}
 
if ( pthread_join ( mythread, NULL ) ) {
printf("error joining thread.");
abort();
}
 
printf("\nmyglobal equals %d\n",myglobal);
 
exit(0);
 
}
int main(void) {

pthread_t mythread;
int i;

if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
printf("error creating thread.");
abort();
}

for ( i=0; i<20; i++) {
myglobal=myglobal+1;
printf("o");
fflush(stdout);
sleep(1);
}

if ( pthread_join ( mythread, NULL ) ) {
printf("error joining thread.");
abort();
}

printf("\nmyglobal equals %d\n",myglobal);

exit(0);

}

But I am still getting errors: I know I am making a silly mistake that will probably take a second to change.

Thanks in advance

May 5th, 2008, 5:56 PM	#1
nannu Newbie Join Date: Apr 2008 Posts: 19 Rep Power: 0	Setting up Fairly new to programming. Any advice would be appreciated. Thanks in advance OK, I am using Microsoft Visual C++ for all of my C++ programming. We have done some very basic code just to get an overview of what is going on. I have found some code below, this code is pretty long compared to what we have done as we skimmed over the programs. But in MS Visual C++ how would I put this into the program. THREADS: c Syntax (Toggle Plain Text) #include <pthread.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> int myglobal; void thread_function(void arg) { int i,j; for ( i=0; i<20; i++ ) { j=myglobal; j=j+1; printf("."); fflush(stdout); sleep(1); myglobal=j; } return NULL; } int main(void) { pthread_t mythread; int i; if ( pthread_create( &mythread, NULL, thread_function, NULL) ) { printf("error creating thread."); abort(); } for ( i=0; i<20; i++) { myglobal=myglobal+1; printf("o"); fflush(stdout); sleep(1); } if ( pthread_join ( mythread, NULL ) ) { printf("error joining thread."); abort(); } printf("\nmyglobal equals %d\n",myglobal); exit(0); } #include <pthread.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> int myglobal; void thread_function(void arg) { int i,j; for ( i=0; i<20; i++ ) { j=myglobal; j=j+1; printf("."); fflush(stdout); sleep(1); myglobal=j; } return NULL; } int main(void) { pthread_t mythread; int i; if ( pthread_create( &mythread, NULL, thread_function, NULL) ) { printf("error creating thread."); abort(); } for ( i=0; i<20; i++) { myglobal=myglobal+1; printf("o"); fflush(stdout); sleep(1); } if ( pthread_join ( mythread, NULL ) ) { printf("error joining thread."); abort(); } printf("\nmyglobal equals %d\n",myglobal); exit(0); } OK what I am doing is when I open up the project I create the work space and give it a name. Now when I copy this code into the project and click compile, I get 1 error saying "Cannot open include file: 'pthread.h': No such file or directory". Now I know that in C++ you can have are .cpp file and a .h file. Now how can I prevent this from happening. I tried changing it up a little. I created a header file and pasted this part in it: c Syntax (Toggle Plain Text) #include <iostream> //#include <FK2008Sample2.h> #include <pthread.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <FK2008Sample> int myglobal; void thread_function(void arg) { int i,j; for ( i=0; i<20; i++ ) { j=myglobal; j=j+1; printf("."); fflush(stdout); sleep(1); myglobal=j; } return NULL; } #include <iostream> //#include <FK2008Sample2.h> #include <pthread.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <FK2008Sample> int myglobal; void thread_function(void arg) { int i,j; for ( i=0; i<20; i++ ) { j=myglobal; j=j+1; printf("."); fflush(stdout); sleep(1); myglobal=j; } return NULL; } and then I created a .cpp file and pasted this in it: using namespace std; c Syntax (Toggle Plain Text) int main(void) { pthread_t mythread; int i; if ( pthread_create( &mythread, NULL, thread_function, NULL) ) { printf("error creating thread."); abort(); } for ( i=0; i<20; i++) { myglobal=myglobal+1; printf("o"); fflush(stdout); sleep(1); } if ( pthread_join ( mythread, NULL ) ) { printf("error joining thread."); abort(); } printf("\nmyglobal equals %d\n",myglobal); exit(0); } int main(void) { pthread_t mythread; int i; if ( pthread_create( &mythread, NULL, thread_function, NULL) ) { printf("error creating thread."); abort(); } for ( i=0; i<20; i++) { myglobal=myglobal+1; printf("o"); fflush(stdout); sleep(1); } if ( pthread_join ( mythread, NULL ) ) { printf("error joining thread."); abort(); } printf("\nmyglobal equals %d\n",myglobal); exit(0); } But I am still getting errors: I know I am making a silly mistake that will probably take a second to change. Thanks in advance Last edited by Ancient Dragon; May 5th, 2008 at 8:15 PM. Reason: add code tags

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