一、找出最长的字符串

#include "stdio.h"#include "string.h"int main(){    int i;    char sx[5],smax[5];    printf("输入五个字符串:");    for(i=0;i<5;i++){            scanf("%s",sx);        if(strlen(sx)>strlen(smax)){             strcpy(smax,sx);        }    }    printf("max is %s\n",smax);        return 0;}

 

二、分类统计字符个数

#include 
     
      #include 
      
       int main(){    char sc[80];    int LETTER,letter,blank,digit,other,i;    LETTER=letter=0;    digit=blank=other=0;    printf("输入一行文字：");    gets(sc);    i=0;    while(sc[i]!='\0'){        if('A'<=sc[i]&&'Z'>=sc[i])            LETTER++;        else if(sc[i]>='a'&&sc[i]<='z')            letter++;        else if(sc[i]>='0'&&sc[i]<='9')            digit++;        else if(sc[i]==' ')            blank++;        else            other++;        i++;    }    printf("LETTER=%d,letter=%d,digit=%d,blank=%d,other=%d\n",LETTER,letter,digit,blank,other);        return 0;}
      
     

 

三、学生信息管理系统

#include "stdio.h"#include "string.h"struct students_list{    int xuehao;    char name[10];    float chengji1,chengji2,chengji3;    float ave;};int Count=0;void new_student(struct students_list students[],int n);void print_student(struct students_list students[]);void search_student(struct students_list students[],char *name);void average_student(struct students_list students[],char *name);int main(){    int choice,n;    char name[10];    struct students_list students[50];    do{        printf("******学生信息管理系统******\n");        printf("\t1:输入学生基本信息\n");        printf("\t2:输出学生基本信息\n");        printf("\t3:计算学生平均成绩\n");        printf("\t4:查找学生基本信息\n");        printf("\t0:退出\n");        printf("请选择功能:");        scanf("%d",&choice);        switch(choice){            case 1:                printf("请输入学生个数:");                scanf("%d",&n);                new_student(students,n);                break;            case 2:                print_student(students);                break;            case 3:                printf("请输入要查找的学生姓名:");                 scanf("%s",name);                average_student(students,name);                break;            case 4:                printf("请输入要查找的学生姓名:");                 scanf("%s",name);                search_student(students,name);                break;            case 0:                break;        }    }while(choice!=0);    printf("谢谢使用学生信息管理系统！\n");        return 0;}void new_student(struct students_list students[],int n){    int i;    if(Count>50){        printf("系统已满！\n");        return;    }    printf("请输入%d个学生的学号、姓名、成绩1、成绩2、成绩3\n",n);    for(i=Count;i

 

四、冒泡排序法

#include 
     
       void sort(int a[80],int n){    int i,j,t;    for(i=0;i
      
       a[j]){                t=a[i];                a[i]=a[j];                a[j]=t;            }        }    }}int main(){    int a[80],n,i;    printf("输入一个整数n:");    scanf("%d",&n);    printf("输入%d个数:",n);    for(i=0;i
      
     

 

五、报数游戏

#include
     
      void CountOff(int n,int m,int out[]){    int i,a[80],j=0,k=0;    for(i=0;i