#include<stdio.h>                                           /*指令；头*/
int main(void);                                             /*空函数*/
{  
   int height，length, width, volume, weight;               /*参数*/
   height = 8;                                    
   length = 10;
   width = 12;
   volume = height * length * width;                        /*体积表达式*/
   weight = (volume + 165) / 166;                           /*空间质量比*/
   printf("Dimensions:%dx%dx%dx\n", lenght, width, height); /*输出值*/
   printf("Volume(cubic inches):%d\n", volume);
   printf("Dimensional weigth(pounds):%d\n", weight);
   return 0;                                               /*返回值为0*/
}

语法错误，编译器会告诉你的，你得屈尊看一下

#include <stdio.h>

int main( void )
{
   int length = 10;
   int width = 12;
   int height = 8;
   int volume = height * length * width;
   int weight = (volume + 165) / 166;
   printf( "Dimensions: %dx%dx%d\n", length, width, height );
   printf( "Volume(cubic inches): %d\n", volume );
   printf( "Dimensional weigth(pounds): %d\n", weight );
}