# 【C/PTA —— 15.结构体2（课内实践）】

## 7-1 计算职工工资

#include<stdio.h>
#include<stdlib.h>
typedef struct GZ
{
char name[6];
double j;
double f;
double z;
double s;
}GZ;

int main()
{
int n = 0;
scanf("%d", &n);
GZ gz[100];
for (int i = 0; i < n; i++)
{
scanf("%s %lf %lf %lf", gz[i].name, &gz[i].j, &gz[i].f, &gz[i].z);
}

for (int i = 0; i < n; i++)
{
gz[i].s = (gz[i].j + gz[i].f) - gz[i].z;
printf("%s %.2lf", gz[i].name, gz[i].s);
}
return 0;
}

## 7-2 计算平均成绩

#include <stdio.h>
#include<stdlib.h>
//定义结构体
struct student
{
char num[20]; //学号
char nam[20];  //姓名
int g;  //成绩
};
int main()
{
struct student st[10];  //结构体数组
int n;
int i;
float sum, aver;  //要求输出小数

scanf("%d", &n);
for (i = 0; i < n; i++)
{
scanf("%s %s %d", &st[i].num, &st[i].nam, &st[i].g);
sum += st[i].g; //录入的同时，计算成绩之和
}
aver = sum / n;  //计算平均成绩
printf("%.2fn", aver);
for (i = 0; i < n; i++)
{
if (st[i].g < aver)
{  //判断小于平均成绩，并输出姓名和学号
printf("%s %sn", st[i].nam, st[i].num);
}
}
}

## 7-3 找出总分最高的学生

#include<stdio.h>
#include<stdlib.h>
struct student {
char num[6];
char name[11];
int score1;
int score2;
int score3;
};
int main()
{
int i, n;
struct student* p;
scanf("%d", &n);
p = (struct student*)malloc(sizeof(struct student));
for (i = 0; i < n; i++)
{
scanf("%s %s %d %d %d", p[i].num, p[i].name, &p[i].score1, &p[i].score2, &p[i].score3);
}
int s[20];
for (i = 0; i < n; i++)
{
s[i] = p[i].score1 + p[i].score2 + p[i].score3;
}
int max, j;
max = s[0];
for (i = 0; i < n; i++)
{
if (s[i] >= max)
{
max = s[i];
j = i;
}
}
printf("%s %s %d", p[j].name, p[j].num, max);
free(p);
return 0;

}

## 7-4 通讯录的录入与显示

#include <stdio.h>
#include <stdlib.h>
int main() {

struct inf {
char name[20];
char birthday[20];
char sex[10];
char tel[20];//固话
char  num[20];//手机
};
int N = 0;
scanf("%d", &N);
struct inf list[N];
int i = 0;
for (; i < N; i++)
{
scanf("%s %s %s %s %sn", &list[i].name, &list[i].birthday, &list[i].sex, &list[i].tel, &list[i].num);

}
int k = 0;
scanf("%d", &k);//要查询的个数
i = 0;
int q[15] = { 0 };//记录要查询哪几条
for (; i < k; i++)
{
scanf("%d", &q[i]);
}
i = 0;
for (; i < k; i++)
{

if (q[i] >= 0 && q[i] < N)//要考虑到查查询的记录的有效性
printf("%s %s %s %s %sn", list[q[i]].name, list[q[i]].tel, list[q[i]].num, list[q[i]].sex, list[q[i]].birthday);
else