抄写例题

例题9.1.1.1
#include<stdio.h>
#include<stdlib.h>
main()
{
    struct student
    {int num;//学号为整形  
    char name[20];//姓名为字符串  
    char sex;//性别为字符串 
    int age;//年龄为整形 
    float score;//成绩为实型 
    char addr[30]; //地址为字符串 
    };//注意最后有一个分号 
 } 
 

--------------------------------
Process exited after 0.1992 seconds with return value 1
请按任意键继续. . .

例题9.1.1
 struct Date 
     {
         int month;
         int day;
         int year;
     };
     struct Student 
     {
         int num;
         char name[20];
         char sex;
         int age;
         struct Date birthday;
         char addr[30];
     };
 } 

--------------------------------
Process exited after 0.1302 seconds with return value 1
请按任意键继续. . .

例题9.1.2.2
#include<stdio.h>
#include<stdlib.h>
main()
{

struct Student 
     {
         int num;
         char name[20];
         char sex;
         int age;
        float score;
         char addr[30];
     }student1,student2;
}

--------------------------------
Process exited after 0.2152 seconds with return value 1
请按任意键继续. . .

例题9.1.3
#include<stdio.h>
#include<stdlib.h>
main()
{struct Student
{long int num;
char name[20];
char sex;
char addr[20];
}a={10101,"li lin",'M',"123 beijing Road"};
printf("NO.;%ld\nname:%s\nsex:%c\naddress:%s\n",a.num,a.name,a.sex,a.addr);
return 0;
}

NO.;10101
name:li lin
sex:M
address:123 beijing Road

--------------------------------
Process exited after 0.1424 seconds with return value 0
请按任意键继续. . .

例题9.2
#include<stdio.h>
#include<stdlib.h>
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,%f",student1.num,student1.name,student1.score);
else if(student1.score<student2.score)
printf("%d,%s,%f",student2.num,student2.name,student2.score);
else
{printf("%d,%s,%f",student1.num,student1.name,student1.score);
printf("%d,%s,%f",student2.num,student2.name,student2.score);
}
return 0;
}

5
6
The higher score is:
6,,0.000000
--------------------------------
Process exited after 5.592 seconds with return value 0
请按任意键继续. . .

例题9.2.1（9.3）
#include<string.h>
#include<stdio.h>
struct Person//声明结构体类型 struct person 
{char name[20];//候选人姓名 
int count;//候选人的票数 
 } leader[3]={"li",0,"zhang",0,"Sun",0};//定义结构体数组并初始化 
 int main()
 {int i,j;
 char leader_name[20];
 for(i=1;i<=10;i++)
 {scanf("%s",leader_name);//输入所选的候选人姓名 
 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);
 return 0;
  }

例题9.2.2（9.4）
#include<stdio.h>
#include<stdlib.h> 
struct Student//声明结构体类型 struct person 
{
    int num;
    char name[20];
    float score;
};
int main()
{
    struct Student stu[5]={{10101,"zhang",78},{10103,"wang",98},{10106,"li",86},{10108,"ling",73},{10110,"sun",100}};//定义结构体数组并初始化
    struct Student temp;
    const int n=5;
    int i,j,k;//定义常变量n 
    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;    //stu[k]和stu[i]元素互换 
    }
    for(i=0;i<n;i++)
    printf("%d,%s,%d",stu[i].num,stu[i].name,stu[i].score);
    printf("\n");
    return 0;
}

例题9.3.1（9.5）
#include<stdio.h>
#include<string.h>
main()
{struct Student
{long num;
char name[20];
char sex;
float score;
};
struct Student stu_1;//定义struct student类型的变量stu_1 
struct Student *p;//定义指向struct student类型数据的指针变量p 
p=&stu_1;//p指向stu—1 
stu_1.num=10101;//对结构体变量的成员赋值 
strcpy(stu_1.name,"li lin");//用字符串复制函数给stu_1.name赋值 
stu_1.sex='M';
stu_1.score=89;
printf("NO.:%ld\nname:%s\nsex:%c\nscore:%d\n",stu_1.num,stu_1.name,stu_1.sex,stu_1.score);
printf("NO.:%ld\nname:%s\nsex:%c\nscore:%d\n",(*p).num,(*p).name,(*p).sex,(*p).score);
return 0;
}

NO.:10101
name:li lin
sex:M
score:0
NO.:10101
name:li lin
sex:M
score:0

--------------------------------
Process exited after 0.1569 seconds with return value 0
请按任意键继续. . .

例题9.3.2
#include<stdio.h>
#include<stdlib.h> 
struct Student//声明结构体类型 struct person 
{
    int num;
    char name[20];
    char sex;
    int age;
};
struct Student stu[3]={{10101,"zhang",'M',78},{10103,"wang",'M',98},{10106,"li",'M',86}};//定义结构体数组并初始化 
main()
{struct Student *p;//定义指向struct student类型数据的指针变量p 
printf("NO.Name   sex age\n");
for(p=stu;p<stu+3;p++)
printf("%d,%s,%c,%d",p->num,p->name,p->sex,p->age);
return 0;
}

NO.Name   sex age
10101,zhang,M,7810103,wang,M,9810106,li,M,86
--------------------------------
Process exited after 0.1499 seconds with return value 0
请按任意键继续. . .

例题9.3.3（9.7）
#include<stdio.h>
#define N 3 
struct Student//声明结构体类型 struct person 
{
    int num;
    char name[20];
    float score[3];//三门课成绩 
    float aver;//平均成绩 
};
int main()
{void input(struct Student stu[]);
struct Student max(struct Student stu[]);
void print(struct Student stu);
struct Student stu[N],*p=stu;//定义结构体数组和指针 
input(p);//调用input函数 
print(max(p));//调用print函数，以max函数的返回值作为实参 
return 0;
}
void input(struct Student stu[])
{int i;
printf("请输入个学生的信息：学号，姓名，三门课成绩：\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]);//输入数据 
stu[i].aver=(stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3.0;//求平均值 
}
}
struct Student max(struct Student stu[])
{int i,m=0;//用m存放成绩最高的学生在数组中的序号 
for(i=0;i<N;i++)
if(stu[i].aver>stu[m].aver)m=i;//找出平均成绩最高的学生在数组中的序号 
return stu[m];//返还值包含该生信息的结构体元素 
}
void print(struct Student stud)
{printf("\n成绩最好的学生是：\n");
printf("学号：%d\姓名：%s\n三门课成绩：%5.1f,%5.1f,%5.1f\n平均成绩：%6.2f，stud.num,stud.name,stud.score[0],stud.score[1],stud.score[2],stud.aver");
}

请输入个学生的信息：学号，姓名，三门课成绩：

总结：抄写例题虽然麻烦，但并不是一无是处的，抄写可以让自己对代码的敲打更加熟练，还可以从书中看出自己在编写是的毛病，让自己对C语言有深层次的理解，并且让自己对所学习的知识重新复习了一次，还是蛮开心的。