c语言33

晨曦到日暮

33.编写程序，输入圆柱的半径和高，求圆柱体积，。要求定义和调用函数cylindern(r,h)计算圆柱体的体积。
#include <stdio.h>
#include<math.h>
#define PI 3.1415926
main()
{
float h,r,v;
v=cylinder(r,h);
/*printf("%3.f\n",v);*/
return 0;
}
cylinder(r,h)
{    float v;
    printf("Enter r :");
    scanf("%f",&r);
    printf("Enter h:");
    scanf("%f",&h);
    v=3.14*r*r*h;
    printf("v=%3.f",v);
        retrun 0;
}
Compiling...
Cpp1.cpp
C:\Users\Administrator\Desktop\Cpp1.cpp(7) : error C2065: 'cylinder' : undeclared identifier
C:\Users\Administrator\Desktop\Cpp1.cpp(7) : warning C4244: '=' : conversion from 'int' to 'float', possible loss of data
C:\Users\Administrator\Desktop\Cpp1.cpp(11) : error C2065: 'r' : undeclared identifier
C:\Users\Administrator\Desktop\Cpp1.cpp(11) : error C2065: 'h' : undeclared identifier
C:\Users\Administrator\Desktop\Cpp1.cpp(12) : error C2448: '<Unknown>' : function-style initializer appears to be a function definition
Error executing cl.exe.

BngThea

函数定义要写返回值，放在main函数后面要事先声明

晨曦到日暮

BngThea 发表于 2018-1-16 17:27
函数定义要写返回值，放在main函数后面要事先声明

不是很懂