实验1

#include <stdio.h>
int main() {
 int x;
 
 printf("输入一个整数:\n");
 scanf("%d",&x);
 
 
 if(x%2==1)
  printf("是奇数");
 else
  printf("是偶数");
  
  return 0;
}
 

 

 

#include<stdio.h>
int main(){
 int days;
 
 printf("输入一个整数:\n");
 scanf("%d",&days);
 
 
 if(days>=1&&days<=5)
  printf("workdats,fighting\n");
 else if(days==6|days==7)
  printf("weekend,relax~\n");
 else
  printf("Ooops,not in 1~7\n");
  
 return 0;
 
  
}

 

 

#include<stdio.h>
int main(){
 char ch;
 
 printf("输入一个字符:\n");
 scanf("%c",&ch);
 
 if(ch>=97&&ch<=122)
 ch = ch -32;
  printf("%c\n",ch);
 
  return 0;
}