I just learned C and fascinates with pointers. Recently I discovered C function system(). I am able to get return values from a program I executed via system ("program.exe"). Eg, program.c:
#include <stdio.h>
int main(){
printf("hello world\n");
return 123;
}
and this code calls program.exe, called call.c
#include <stdio.h>
#include <stdlib.h>
int main(){
int a;
printf("calling program.exe:\n");
a=system("program.exe");
printf("program.exe returned %d at exit\n",a);
return 0;
}
When I execute call.exe, I get this
calling program.exe:
hello world
pm returned 123 at exit
I was like, wow! This return value and system() function thing is like a new way to interprocess communication for me. But my question is, can I get a string return from the system() function?
Ii tried changing program.c "int main()" to "char * main()", and return 123 to return "bohemian rhapsody" and change "int a;" to "char *a;", printf format %d to %s in call.c, but I only get funny characters when I execute call.exe. I wonder what's wrong?
