How to give parameters from C to shell ??

[Snoopydog]

hello to all, im working with debian sarge 3.1, and need do 2 programs, one is a C program and the other is Shell program. My problem is the next: i need to guive parameters from C program to shell program, for example:

i have this program shell:

#!/bin/bash

num=$1

echo "The number is $1"

exit 0

with the shell i need get parameters strings or integers.

and the C program is:

#include <stdio.h>
#include <stdlib.h>
int main()
{

FILE *f=null;

int a=23;
char script[100];

sprintf(script,"/home/user/script.sh %d",a);
f=popen(script,"r");
system("exec /home/user/script.sh");
if (f==null)
{
perror("it cant find program script.sh");
exit(-1);
}
pclose(f);
return 0;
}

but, when the shell is executed only print "the number is", it cant get the parameter, and the program C create other new file with name "script.sh 23".

i need that my shell print "The number is 23".

well i hope that can help me and thanks =)

[jozyba]

Your shell script is okay, but I think the C program should be more like:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a=23;
    char script[100];

    sprintf(script,"/home/sand/script.sh %d",a);
    system(script);

    return 0;
}

[Snoopydog]

OMG!! thats really true

i can get parameters with my shell *0* ty a lot joziba this problem is solve