#include <stdio.h>
int main()
{
    int x,i,a,sum=0;
    printf("你需要输入几个数：");
    scanf("%d",&x);
    for(i=1;i<=x;i++)
    {
        printf("请输入你所输入的数："); 
        scanf("%d",&a);
        if(a%2!=0)
        {
            sum=sum+a;
        }
    }
    printf("x个奇数的和为: %d",sum);
    return 0;
}

#include<stdio.h>//求圆柱体体积 
double y;
void cylinder(double r,double height)
{
    y=3.14*r*r*height;
}
int main()
{
    double r,height;
     printf("请输入圆柱体的半径和高：");
    scanf("%lf %lf",&r,&height);
    cylinder(r,height);
    printf("%.2f\n",y);
    return 0;
}

#include<stdio.h>
double mypow()
{
    double x,m=1;
    int n,i;
    printf("请输入x和n的值：");
    scanf("%lf %d",&x,&n);
    for(i=1;i<=n;i++)
    m=m*n;
    printf("%f的%d次方的值是%f",x,n,m); 
}
int main()
{
    mypow();
return 0;
}