#include<stdio.h>     /*包含头文件*/
#define Hight 10      /*定义常量*/

int calculate(int Long,int Width);     /*函数声明*/

int main()            /*产生函数*/
{
    int m_Long;       /*定义整型变量，表示长度*/
    int m_Width;      /*定义整型变量，表示宽度*/
    int result;       /*定义整型变量，表示长方体的体积*/
   
    printf("长方体的高度为：%d\n",Hight);     /*显示提示*/
   
    printf("请输入长度\n");      /*显示提示*/
    scanf("%d,&m_LOng");         /*输入长方体的长度*/
   
    printf("请输入宽度\n");      /*提示显示*/
    scanf("%d,&m_Width");        /*输入长方体的宽度*/
   
    result=calculate(m_Long,m_Width);    /*调用函数，计算体积*/
    printf("长方体的体积是：");         /*显示提示*/
    printf("%d\n",result);               /*输出体积大小*/
    return 0;                            /*返回整形0*/
   
}

int calculate(int Long,int Width)        /*定义计算体积函数*/
{
    int result=Long*Width*Hight;        /*具体计算体积*/
    return result;                       /*将计算的体积结果返回*/
 }

scanf("%d,&m_LOng"); 应该是 scanf("%d",&m_LOng); 吧，其它也这么改

#include <stdio.h>

int calculate( int length, int width, int height );

int main( void )
{
    const int height = 10;
    printf( "长方体的高度为：%d\n", height );
   
    int length;
    printf( "请输入长度: " );
    scanf( "%d", &length );

    int width;
    printf( "请输入宽度: " );
    scanf( "%d", &width );

    int volume = calculate( length, width, height );
    printf( "长方体的体积是: %d\n", volume );
}

int calculate( int length, int width, int height )
{
    return length * width * height;
}

#include <stdio.h>

long long  calculate( int length, int width, int height );

int main( void )
{
    const int height = 10;
    printf( "长方体的高度为：%d\n", height );
   
    int length;
    printf( "请输入长度: " );
    scanf( "%d", &length );

    int width;
    printf( "请输入宽度: " );
    scanf( "%d", &width );

    long long volume = calculate( length, width, height );
    printf( "长方体的体积是: %lld\n", volume );
}

long long calculate( int length, int width, int height )
{
    return (long long) length * width * height;
}

[此贴子已经被作者于2021-8-3 21:55编辑过]