抄写例题作业
9.1
#include<stdio.h> int main(){ struct student{ long int num; char name[20]; char sex; char addr[20]; }a={10101,"zhangqi",'M',"123 beijing road"}; printf(" NO.: %d\n name: %s\n sex: %c\n addr: %s\n",a.num,a.name,a.sex,a.addr); }
NO.;10101 name:li lin sex:M address:123 beijing Road -------------------------------- Process exited after 0.434 seconds with return value 0 请按任意键继续. . .
9.2
#include<stdio.h> int main(){ struct student{ int num; char name[20]; float score; }; struct student 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(student2.score>student1.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); } }
10103,ling,98.000000 -------------------------------- Process exited after 0.3591 seconds with return value 0 请按任意键继续. . .
9.3
#include<stdio.h> #include<string.h> struct Person { char name[20]; int count; } leader[3]={"Li",0,"Zhang",0,"Wang",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); return 0; }
Li Li Sun Zhang Zhabg Sun Li Sun Zhang Li Result: li:0 zhang:0 Sun:3 -------------------------------- Process exited after 85.36 seconds with return value 0 请按任意键继续. . .
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; }
the order is: 10110,sun,010103,wang,010106,li,010101,zhang,010108,ling,0 -------------------------------- Process exited after 0.2652 seconds with return value 0 请按任意键继续. . .
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.Name sex age 10101,zhang,M,7810103,wang,M,9810106,li,M,86 -------------------------------- Process exited after 0.4277 seconds with return value 0 请按任意键继续. . .
9.6
#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.:10101 name:li lin sex:M score:0 NO.:10101 name:li lin sex:Mscore:0 -------------------------------- Process exited after 0.4299 seconds with return value 0 请按任意键继续. . .
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;//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"); }
请输入各学生的信息：学号、姓名、三门课成绩： 21 zh 36 37 38 22 ji 25 26 28 23 li 54 23 12 成绩最高的学生: 学号:21 姓名:zh 三门课成绩: 36.0, 37.0, 38.0 平均成绩: 37.00 -------------------------------- Process exited after 24.31 seconds with return value 0 请按任意键继续. . .
总结：函数的定义和调用还需要练习。
