【C语言】结构体数组，指针，函数的应用

结构体数组，指针，函数的应用

选民系统小实验(学习记录)

代码展示

#include <stdio.h>
#include <string.h> 
#include <assert.h>
#include <stdlib.h> 

struct vote
{
    char name[32];
    int num;
};
struct vote* input_vote_num(struct vote *pvote, int *vote_num)
{
    
    printf("请输入投票人数：");
    scanf("%d", vote_num);
    assert(vote_num > 0);
    pvote = (struct vote *)malloc(*vote_num * sizeof(struct vote) );
    struct vote *back = pvote;//注意返回的是malloc分配后的地址
    assert(pvote != NULL);
    for (int i = 0; i < *vote_num; i++)
    {
        printf("请输入第%d个投票人姓名：", i+1);
        scanf("%s", pvote->name);
        pvote->num=0;
        pvote++;
    }
    pvote = back;
    return pvote;
}

void output_vote_result(struct vote *pvote, int *count)
{
    printf("请输入选民的名字：");
    for (int i = 0; i < *count; i++)
    {
        printf("%s  ", pvote->name);
        //printf("投票人票数：%d\n", pvote->num);
        pvote++;
    }
    printf("\n");
}

int voteing(struct vote *pvote, int *vote_num)
{
    int vote_count = 0;
    char name[8];
    int feipiao = 0;
    int temp = 0;
    struct vote *back = pvote;//注意返回的是malloc分配后的地址
    // len = sizeof(sizeof(struct vote)/);
    for (int i = 0; i < 5; i++)
    {  
        printf("请输入投给谁的名字：\n");
        scanf("%s", name);
        for (int j = 0; j < *vote_num; j++)
        {
            if (strcmp(name,pvote->name) == 0){
                printf("给%s投票成功\n",pvote->name);
                pvote->num++;
                temp = 1;
            }
            pvote++;

        }
        pvote = back;
        if (temp==0){
            feipiao++;
            printf("给%s投票失败，弃票数位%d\n",name,feipiao);
        }
    }
    return feipiao;
    
}     

struct vote* getmax(struct vote *pvote, int *vote_num)
{
    struct vote *max_vote = pvote;
    for (int i = 0; i < *vote_num; i++)
    {
        if (pvote->num > max_vote->num)
        {
            max_vote= pvote;
        }
        pvote++;
    }
    return max_vote;
}



//选票系统投票
int main()
{
    struct vote *pvote = NULL;
    struct vote *final ;
    int vote_num = 0;
    //输入投票人数
    pvote = input_vote_num(pvote, &vote_num);
    //输出投票人数
    output_vote_result(pvote, &vote_num);
    //开始投票
    int feipiao = voteing(pvote,&vote_num);
    printf("%d个废票\n",feipiao);

    final = getmax(pvote,&vote_num);
    printf("投票结果：%s 票数为: %d\n",final->name, final->num);
    
    
    return 0;
}