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例题抄写作业

例9.1 把一个学生的信息放在一个结构体变量中,然后输出这个学生的信息

#include<stdio.h>
int main()
{
    struct stu
    {
        long int num;
        char name[20];
        char sex[3];
        char addr[20];
    }a={1010,"张鑫家","","qqq"};
    printf("No:%ld\nname:%s\nsex:%c\naddress:%s\n",a.num,a.name,a.sex,a.addr);
 }

运行结果:

No:1010
name:张鑫家
sex:8
address:qqq

--------------------------------
Process exited after 0.1287 seconds with return value 0
请按任意键继续. . .

没有出现问题

例9.2 输入两个学生的学号,姓名和成绩,输出成绩较高的学生的学号,姓名和成绩。

#include <stdio.h>
int main()
{
    struct student 
    {
        int num;
        char name[20];
        float score;

    } student1,student2;
    scanf("%d%s%f", &student1.num, &student1.name, &student1.score);
    scanf("%d%s%f", &student2.num, &student2.name, &student2.score);
    printf("The higher score is:\n");
    if (student1.score > student2.score)
        printf("%d  %s  %6.2f\n", student1.num, student1.name, student1.score);
    else if (student1.score < student2.score)
        printf("%d  %s  %6.2f\n", student2.num, student2.name, student2.score);
    else
    {
        printf("%d  %s  %6.2f\n", student1.num, student1.name, student1.score);
        printf("%d  %s  %6.2f\n", student2.num, student2.name, student2.score);
    }
}

运行结果:

01 wang 89
02 ling 64
The higher score is:
1 wang 89.00

--------------------------------
Process exited after 34.9 seconds with return value 0
请按任意键继续. . .

没有出现问题

例9.3 有三个候选人,每个选民只能投票选一人,要求编一个统计选票的程序,先后输入备选人的名字,然后输出各人的得票结果

#include<string.h>
#include<stdio.h>
struct person
{
    char name[20];
    int count;
}leader[3]={"li",0,"zhang",0,"sun",0};
int main()
{
    int i,j;
    char leader_name[20];
    for(i=1;i<=10;i++)
    {
        scanf("%s",leader_name);
        for (j=0;j<3;j++)
        if (strcmp(leader_name,leader[j].name)==0)leader[j].count++;
    }
    printf("\nResult:\n");
    for(i=0;i<3;i++)
        printf("%5s:%d\n",leader[i].name,leader[i].count);
}

运行结果:

li
zhang
sun
zhang
zhang
li
sun
li
li
li

Result:
li:5
zhang:3
sun:2

--------------------------------
Process exited after 16.26 seconds with return value 0
请按任意键继续. . .

没有出现问题

例9.4 有n个学生的信息,要求按照成绩的高低顺序输出各学生的信息

#include <stdio.h>
struct student
{
int num;
char name[20];
float score;
};
int main()
{
struct student stu[5]={{ 10101,"zhang",78},{10103,"wang",98.5},{10106,"li",86},{ 10108,"ling",73.5},{ 10110,"sun",100}};
struct student temp;
const int n=5;
int i,j,k;
printf("The order is:\n");
for(i=0;i<n-1;i++)
{k=i;
for(j=i+1;j<n;j++)
if(stu[j].score>stu[k].score)
k=j;
temp=stu[k];stu[k]=stu[i];stu[i]=temp;
}
for(i=0;i<n;i++)
printf("%6d %8s %6.2f\n",stu[i].num,stu[i].name,stu[i].score);
printf("\n");
return 0;
}

运行结果:

The order is:
10110 sun 100.00
10103 wang 98.50
10106 li 86.00
10101 zhang 78.00
10108 ling 73.50


--------------------------------
Process exited after 0.2378 seconds with return value 0
请按任意键继续. . .

.

没有出现问题

例9.5 通过指向结构体变量的指针变量输出结构体变量中成员的信息

#include <stdio.h>
#include <string.h>
int main()
{
    struct student
    {
        long num;
        char name[20];
        char sex;
        float score;
    };
    struct student stu1;
    struct student *p;
    p=&stu1;
    stu1.num=10101;
    strcpy(stu1.name, "Li Lin"); 
    stu1.sex=M;
    stu1.score=89.5;
    printf("No.:%1d\nname:%s\nsex:%c\nscore:%5.1f\n",stu1.num,stu1.name,stu1.sex,stu1.score);
    printf("\nNo.:%1d\nname:%s\nsex:%c\nscore:%5.1f\n",(*p).num,(*p).name,(*p).sex,(*p).score);
    return 0;
}

输出结果:

No.:10101
name:Li Lin
sex:M
score: 89.5

No.:10101
name:Li Lin
sex:M
score: 89.5

--------------------------------
Process exited after 0.1261 seconds with return value 0
请按任意键继续. . .

没有出现问题

例9.6 有三个学生的信息,放在结构体数组中,要求输出全部学生的信息

#include <stdio.h>
struct student
{
    int num;
    char name[20];
    char sex;
    int age;
};
struct student stu[3]={{10101,"Li Lin",M,18},{10102,"Zhang Fang",M,19},{10103,"Wang Min",F,20}};
int main()
{
    struct student *p;
    p = stu; 
    printf("No.   Name                sex age\n");
    for (p=stu;p<stu+3;p++)
        printf("%5d %-20s%2c%4d\n",p->num,p->name,p->sex,p->age);
}

运行结果:

No. Name sex age
10101 Li Lin M 18
10102 Zhang Fang M 19
10103 Wang Min F 20

--------------------------------
Process exited after 0.1379 seconds with return value 0
请按任意键继续. . .

出现一些输入上的小问题,发现后改正。

例9.7 有n个结构体变量,内含学生学号,姓名和三门课程的成绩,要求输出平均成绩最高的学生的信息

#include<stdio.h>
#define N 3 
struct Student
{
    int num;
    char name[20];
    float score[3];
    float aver;
};
int main()
{void input(struct Student stu[]);
struct Student max(struct Student stu[]);
void print(struct Student stu);
struct Student stu[N],*p=stu;
input(p);
print(max(p));
return 0;
}
void input(struct Student stu[])
{int i;
printf("??ê?è??÷?§éúμ?D??¢£o?§o?£?D???£?èy????3é?¨£o\n");
for(i=0;i<N;i++)
{scanf("%d %s %f %f %f",&stu[i].num,stu[i].name,&stu[i].score[0],&stu[i].score[1],&stu[i].score[2]);
stu[i].aver=(stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3.0;
}
}
struct Student max(struct Student stu[])
{int i,m=0;
for(i=0;i<N;i++)
if(stu[i].aver>stu[m].aver)m=i;
return stu[m];
}
void print(struct Student stud)
{printf("\n3é?¨×?o?μ??§éúê?£o\n");
printf("?§o?£o%d\D???£o%s\nèy????3é?¨£o%5.1f,%5.1f,%5.1f\n???ù3é?¨£o%6.2f\n",stud.num,stud.name,stud.score[0],stud.score[1],stud.score[2],stud.aver);
}

运行结果:

请输入各学生的信息:学号,姓名,三门课成绩:
01 li 76 87 76
02 zhang 98 87 78
03 liu 65 87 98

成绩最好的学生是:
学号:2姓名:zhang
三门课成绩: 98.0, 87.0, 78.0
平均成绩: 87.67

--------------------------------
Process exited after 31.16 seconds with return value 0
请按任意键继续. . .

这道题抄写的时候因为这道题太长加上太长时间抄写出现了许多小错误,发现之后一点点改正

上传截图:

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 总结:例题抄写虽然累,但还是学到了许多东西,程序的输入也更加熟练,输入的速度也提高了一些。

例题抄写作业