C/C++ - 多线程

#include <stdio.h>
#include <pthread.h>

int i = 0;

void*Run(void*args) {
    i++;
    printf("%d:Hello World!\n", i);
}

int main() {
    pthread_t tids[5];
    int ret;

    for(int i = 0; i < 5; i++) {
        if((ret = pthread_create(&tids[i], NULL, Run, NULL)) != 0)
            puts("Create error!");
    }
    pthread_exit(NULL);

    return 0;
}