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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
void child_function() {
    printf("This is the child process
");
    // ×ÓÀú³ÌÖ´ÐеÄÂß¼­´¦Öóͷ£
}
int main() {
    pid_t pid = fork();
    if (pid < 0) {
        // ´¦Öóͷ£fork()¹ýʧµÄÇéÐÎ
        fprintf(stderr, "Fork failed
");
        exit(1);
    } else if (pid == 0) {
        // ×ÓÀú³Ì
        child_function();
        exit(0);
    } else {
        // ¸¸Àú³Ì
        printf("This is the parent process
");
        // ¸¸Àú³ÌÖ´ÐеÄÂß¼­´¦Öóͷ£
        // ÆÚ´ý×ÓÀú³Ì¿¢ÊÂ
        wait(NULL);
        printf("Child process completed
");
    }
    return 0;
}ÔÚÉÏÊöʾÀýÖУ¬Í¨¹ýfork()½¨ÉèÁËÒ»¸ö×ÓÀú³Ì£¬ÔÚ×ÓÀú³ÌÖÐͨ¹ýchild_function()º¯ÊýÖ´ÐÐÌض¨Âß¼­¡£¸¸Àú³ÌÔò¿ÉÒÔÖ´ÐÐ×Ô¼ºµÄÂß¼­£¬²¢Í¨¹ýwait()ÆÚ´ý×ÓÀú³Ì¿¢Ê¡£

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