C语言中用函数求圆柱体底面积和体积用代码回答谢谢,秒回、//3.函数求圆柱体底面积和体积#includeint sum(int a);int num(int b);void main()int sum(int a);{double s;s=3.14*a*a;return s;}int num(int t){s=sum(s);t=s*b

C语言中用函数求圆柱体底面积和体积用代码回答谢谢,秒回、//3.函数求圆柱体底面积和体积#includeint sum(int a);int num(int b);void main()int sum(int a);{double s;s=3.14*a*a;return s;}int num(int t){s=sum(s);t=s*b
C语言中用函数求圆柱体底面积和体积
用代码回答谢谢,秒回、
//3.函数求圆柱体底面积和体积
#include
int sum(int a);
int num(int b);
void main()
int sum(int a);
{
double s;
s=3.14*a*a;
return s;
}
int num(int t)
{
s=sum(s);
t=s*b;
return t;
}
{
int a,b,s,t;
printf("请输入该圆柱体的高");
scanf("%d",&b);
printf("请输入该圆的底面半径");
scanf("%d",&a);
printf("它的底面积为%d",sum(s));
printf("它的体积为%d",sum(t));
}你看一下我这段代码哪里错了

C语言中用函数求圆柱体底面积和体积用代码回答谢谢,秒回、//3.函数求圆柱体底面积和体积#includeint sum(int a);int num(int b);void main()int sum(int a);{double s;s=3.14*a*a;return s;}int num(int t){s=sum(s);t=s*b
float fun_s(float r)
{
return 2*3.14*r;
}
float fun_v(float r,float h)
{
return 3.14*r*r*h;
}