#include <stdio.h>

#include <stdlib.h>

#include <Windows.h>

#include<process.h>

#include <time.h>

#define N 1024

struct 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 = ; 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] = {  };
　　 // 进行赋值

    for (int i = ; i < N; i++)

    {

        data[i] = rand() % ;

        //printf("%4d", data[i] = rand() % 1000);

    }

    int sum = ;
　　 //计算总和

    for (int i = ; i < N; i++)

    {

        sum += data[i];

    }

    printf("\n总和=%d", sum);

    struct Myinfo info[] = {  };

    for (int i = ; i < ;i++)

    {

        info[i].id = i;

        info[i].length = N / ;

        info[i].sum = ;

        info[i].pstart = data + i*N / ; //注意这里地址的移动

        _beginthread(add, , &info[i]);

    }

    system("pause");

    int lastsum=;

    for (int i = ; i < ;i++)

    {

        lastsum += info[i].sum;

    }

    printf("\n多线程总和=%d", lastsum);

    system("pause");

}