运行时在c源代码中编译另一个源代码

Question

This is an extremely weird question, but I am still curious. I have a source code ac , in it, I have some magic code that compiles a different code bc in the same directory. Hence, during runtime, bc is compiled and perhaps ran.

I apologize for this question to be vague, but is this something that's been done before? If not, is there any way to do so?

Answer 1

ac :

#include <stdio.h>

int main() {
    puts("a: compiling b.c");
    system("gcc -o b b.c");
    puts("a: executing b");
    system("./b");
    puts("a: done");
    return 0;
}

bc :

#include <stdio.h>

int main() {
    puts("b: hello world");
    return 0;
}

output :

a: compiling b.c
a: executing b
b: hello world
a: done

Answer 2

Yes, you can fork and exec to run the compiler, and then fork and exec again to run the compiled code. The other option is to use the system function to run the compiler, and then call system again to run the compiled code.