多线程计算整型数组数据总和：
#include <stdio.h>#include <stdlib.h>#include <Windows.h>#include<process.h>#include <time.h>#define N 1024struct Myinfo{ int *pstart;//开始地址 int length;//长度 int id;//线程编号 int sum;//存储数据的和};void add(void *p) //void *p可以保存任何类型的指针{ struct Myinfo *pinfo = p; for (int i = 0; i < pinfo->length;i++) { pinfo->sum += pinfo->pstart[i]; } printf("\n线程%d计算的结果%d", pinfo->id, pinfo->sum);}void main(){ time_t ts; unsigned int num = time(&ts);//传递地址 srand(num); int data[N] = { 0 }; // 进行赋值 for (int i = 0; i < N; i++) { data[i] = rand() % 1000; //printf("%4d", data[i] = rand() % 1000); } int sum = 0; //计算总和 for (int i = 0; i < N; i++) { sum += data[i]; } printf("\n总和=%d", sum); struct Myinfo info[8] = { 0 }; for (int i = 0; i < 8;i++) { info[i].id = i; info[i].length = N / 8; info[i].sum = 0; info[i].pstart = data + i*N / 8; //注意这里地址的移动 _beginthread(add, 0, &info[i]); } system("pause"); int lastsum=0; for (int i = 0; i < 8;i++) { lastsum += info[i].sum; } printf("\n多线程总和=%d", lastsum); system("pause");}
在此也可以结合队列来使用，队列控制取到的计算点
如果可以，我真想和你一直旅行。或许是某个未开发的荒凉小岛，
