Question

How to use fork to create a new process (child process) in C

Answer 1

#include <stdio.h>
#include <unistd.h>

int main() {
    int id = fork();
    
    printf("%d\n", id);

    printf("c programming\n");
    
    return 0;
}



/*
run:

20
c programming
0
c programming

*/

 

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Answer 2

#include <stdio.h>
#include <unistd.h>

int main() {
    int id = fork();
    
    printf("%d\n", id);
    
    if (id != 0) {
        fork();
    }

    printf("c programming\n");
    
    return 0;
}



/*
run:

0
c programming
20
c programming
20
c programming

*/

 

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