实验3

#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<5) {
        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;

#include<stdio.h>
#include<math.h>
int main()
{
    int k,i,m,n;
    n=0;
    for(k=101;k<=200;k++)
    {    m=sqrt(k);
    for(i=2;i<=m;i++)
    if(k%i==0)break;
    if(i>m&&k>1)
     {    printf("%d ",k);
        n=n+1;
    if(n%5==0)    
    printf("\n");    }
    }
    printf("\n100~200之间有%d个素数",n);
    return 0;
}

#include<stdio.h>
int main()
{
    long n;
    int j,k,z;
    printf("Enter a number :");
    scanf("%ld",&n);
    printf("new number is:");
    while (n>=10)
    {
        k=n;
        z=1;
        while(k!=0)
        {
            k=k/10;
            z=z*10;
        }
        z=z/10;
        j=n/z;
        if(j%2!=0)
        {
            printf("%d",j);
        }
        n=n-z*j;
    }
    if(n%2!=0)
    printf("%d",n);
    return 0;

}

#include<stdio.h>
int main()
{
    double s,n,a;
    int x,y;
    printf("Enter n and a:\n");
    scanf("%lf%lf",&n,&a);
    x=1;
    y=a;
    do
    {
        s=s+x/a;
        a=a*10+y;
        x++;
    }while(x<=n);
    printf("s=%lf",s);
    return 0;
 } 

总结：循环语句的嵌套不熟练。