使用多线程和sleep函数生成字符串的伪随机排列(阿里巴巴2014武汉站一道题)

使用多线程和sleep函数生成字符串的伪随机排列(阿里巴巴2014武汉站一道题)

注意编译连接时需要链接pthread库，即g++ XX.cpp -o XX -lpthread

#include <stdio.h>#include <unistd.h>#include <pthread.h>void* thread(void* v){char ch = *(char*)v;sleep(1); //用于控制。putchar(ch);}int main(){pthread_t id[7]; int i ,ret;char str[] = "abcdefg";for(i = 0; i < 7; ++i){ret = pthread_create(&id[i],NULL,thread,&str[i]);if(0 != ret){printf("create pthread error\n");i--;}}for(i = 0; i < 7; ++i)pthread_join(id[i],NULL);printf("\n");return 0;}