题目一：简单输出

  #include<stdio.h>
int main()

 {

 printf("李家豪");

return 0;

 }

题目二：计算圆的面积

 #define PI 3.14
 double(alculatevolume lint radius);
 int main()
 {
 int cRadius =0;
 double square=0.0;
 printf ("请输入圆的半径: \n");
 scanf("%d";&cRadius);
 square=calculatesquare (cRadius);
 printf("请输入圆的面积是:%f \n",square);
 return 0;
 }
 double calculateVolume (int radius)
 {
 double result = PI*radius*radius;
 return result;
 }