请高手帮我看看这段程序是什么意思

int width,height;

void main ()

{

unsigned char* arr1;

visual();

arr1 = (unsigned char*)malloc(sizeof(unsigned char)*width*height);

arr1 = openfile(file, width, height);

writefile(arr1,width,height);

}

void visual()

{

printf("Input the file name:");

scanf("%s",&file);

printf("The width is\n");

scanf("%d",width);

printf("The height is\n");

scanf("%d",height);

}

大致上就是说某个表格文件的高度和宽度 具体的我也不是很明白