实验三

/* 
编程找出5个整数的最大数和最小数 
《C语言程序设计教程学习指导》p122实验内容(3) 
*/ 

#include 
#include 
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>=1) {
        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
#include
int isprime(int n);
int main() 
{
    int i;
    int s;
    s=1;
    for(i=101;i<=200;i++)
    {
        if(isprime(i))
        printf("%4d\n",i);
        s++;
    }
    printf("101~200之间有27个素数",s);
        return 0;
}
int isprime(int n)
{
    int k;
    for(k=2;k<=sqrt(n);k++)
    if(n%k==0)
    return 0;
    return 1;
}

 

#include
#include
int main() 
{
     int b,i,e=0,f=1;
    printf("Enter a number:");
    scanf("%d",&b);
    while(c>0)
    {
        i=b%10;
        if(i%2!=0)
        {
            e=e+i*f;
        f=f*10;
        }
        b=b/10;
        }
        printf("\nnew number is:%d",e);
    return 0;
}

#include  
int main() {
    double a, s, t, m = 0;
    int b, n;
    printf("Enter n and a:");
    scanf("%d %lf", &n, &a);
    for (b = 1, s = 0; b <= n; b = b + 1) {
        m = a + m * 10;
        t = b / m;
        s = s + t;
    }
    printf("s = %lf\n", s);
    return 0;
}