第十二次作业

#include<stdio.h>
#include<string.h>
int main()
{
int i;
char sx[80],smax[80];
printf("请输入5个字符串：\n");
scanf("%s",sx);
strcpy(smax,sx);
for(i=1;i<5;i++)
{
scanf("%s",sx);
if(strcpy(smax,sx)>0)
strcpy(smax,sx);
}
printf("最长的字符串是：%s\n",smax);
return 0;
}

#include<stdio.h>
int main()
{
char ch;
int num,word,other,kong;
int i;
num=word=kong=other=0;
printf("请输入10字符：\n");
for(i=1;i<=10;i++)
{scanf("%c",&ch);
if(ch>='0'&&ch<='9')
num++;
else if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))
word++;
else if(ch==' ')
kong++;
else
other++;
}
printf("num=%d,kong=%d,word=%d,other=%d\n",num,word,kong,other);
return 0;
}

#include<stdio.h>
#include<string.h>
struct students_list{
char name[50],xh;
int Chinese,Math,English;
double average;
};
int Count=0;
void new_student(struct students_list students[]);
void print_student(struct students_list students[]);
int main()
{
int choice;
char name[50];
struct students_list students[50];
do{
printf("******学生信息查询******\n");
printf("\t1:输入\n");
printf("\t2:查询\n");
printf("\t3:输出\n");
printf("\t0:退出\n");
scanf("%d",&choice);
switch(choice){
case 1:
new_student(students);
break;
case 2:
printf("请输入学生姓名：");
scanf("%s",name);
break;
case 3:
print_student(students);
break;
case 0:
break;
}
}while(choice!=0);
printf("感谢您使用本系统！\n");
return 0;
}
void new_student(struct students_list students[])
{
struct students_list f;
if(Count==50){
printf("信息列表已满！\n");
return;
}
printf("请输入学生的姓名：");
scanf("%s",f.name);
printf("请输入学生的语文成绩：");
scanf("%d",&f.Chinese);
printf("请输入学生的数学成绩：");
scanf("%d",&f.Math);
printf("请输入学生的英语成绩：");
scanf("%d",&f.English);
printf("请输入学生的学号：");
scanf("%s",f.xh);
students[Count]=f;
Count++;
}
void print_student(struct students_list students[])
{
printf("学生信息列表的学生信息如下：\n");
int i;
for(i=0;i<Count;i++)
{
printf("%s\t%d\t%d\t%d\t%.2lf\t%s\t\n",students[i].name,students[i].Chinese,students[i].Math,students[i].English,students[i].average,students[i].xh);
}
}