running program with arguments (linux)

Well, I wanted to know how I can run a program from a program, eg:

int main()
{
char *prog;
cout<<"Run: "; // --> g++ -o file1.cpp file2
cin>>prog;

[code to run prog with arguments]
}

I hope you understand what I mean.
I tried system("g++ -o...") but that doesn't work. thanks

You use fork() and execve(and its derivatives) to run a program within a program.
Fork creates a copy of the current process and you overwrite the content of the child by an execve call.


[CODE]
#include <unistd.h>
// some other header files that I could not remember now.
// Check man fork and man execve.

main()
{
char *prog = "./myprog.o";
char *parameter = "23";
pid_t pid;
int status;

pid = fork();
if (pid == 0) {
execlp(prog, prog, parameter, NULL);
}
wait(&status);
return 0;
}

It is a very primitive program but the general approach is this apart from the
system function.

thanks, that was exactly what I was searching for!