实验三

part2
#include <stdio.h>
#include <stdlib.h>
int main() {
int number, max, min, n;
n=1;
printf("输入第%d个数: ", n);
scanf("%d", &number);
max = number;
min = number;
while(n<=4) {
n++;
printf("输入第%d个数: ", n);
scanf("%d", &number);
if(number>=max)
max = number;
else if(number<=min)
min = number;
}
printf("最大数为: %d\n", max);
printf("最小数为: %d\n", min);
system("pause");
return 0;
}

 

 

part3-1

# include<stdio.h>
# include<math.h>
int prime(int n);
int main()
{
      int i;
       int t;
      for(i=101;i<=200;i++)
      {
          if(prime(i)){
          
             printf("%4d",i);
             t++;}
             
             
      }
          printf("101~200之间一共有%d个素数",t);
      return 0;
      
    
}
int prime(int n)
{
    int k;
    for(k=2;k<=sqrt(n);k++)
       if(n%k==0)
         return 0;
         
    return 1;
}

 

 

part3-2

#include<stdio.h>
#include<math.h>
int main(){
long int x,y,m,n;
    printf("Enter a number:");
    scanf("%ld",&x);
    y=0,m=1;
    for(;x>0;)
    {
        n=x%10;
        if(n%2!=0)
        {
            y=y+n*m;
            m=m*10;
        }
        x=x/10;
    }
    printf("The new number is:%d",y);
    return 0;
}