Beginner C language, 2.0

Beginner learning C language, there are mistakes, but I hope to forgive me,

include<stdio.h>  \\包含头函数
#define Height 10  \\定义常量 全局
int calculate(int Long,int Width); \\ 此处进行函数声明 calculate 函数
int main()
{       
        int m_Long;
                int m_Width;
                int result;

     printf("长方形的高是;%d\n",Height);\\ 有意思的是，%d是打印整形。

     printf("长方形的长是：\n");
     scanf("%d",&m_Long);\\&是取地址符号，告诉计算机使用变量；

     printf("长方形的宽是：\n");
     scanf("%d“，&m_Width);

     result=calculate(m_Long,m_Width);
     printf("长方形的体积是：%d",result);

     return 0;
     }
     int calculate(int Long,int Width);
     {
           int result=Long*Width*Height;
                 return result;
        }