17-10-05作业

题目一：简单输出

#include<stdio.h>
int main()
{
    putchar('w');
    putchar('w');
    putchar('c');
    putchar('\n');
    return 0;
}

题目二：计算圆的面积

#include<stdio.h>
#define PI 3.14
double calculateVolume(int helght,int radius);
int main()
{
    int cHeight = 0;
    int cRadius = 0;
    double volume = 0.0;
    printf("请输入圆柱体的底面半径:\n");
    scanf("%d",&cRadius);
    volume=calculateVolume(cHeight,cRadius);
    printf("圆柱体的底面积是:%f\n",volume);
    return 0;   
}
double calculateVolume(int height,int radius)
{
    double result = PI*radius*radius;
    return result;
}