C语言实现：读取BMP图像并提取特定像素颜色

#include<stdio.h>
int main() 
{ 
 int width,height,x,y;
 unsigned short bitCount;
 int offbits;
 int bitPerLine;
 unsigned char data;
 FILE* bmpfp = fopen("E:\\风景\\风景1.bmp","rb"); 
 fseek(bmpfp,18,SEEK_SET); 
 fread(&width,sizeof(int),1,bmpfp); 
 fread(&height,sizeof(int),1,bmpfp); 
 printf("width : %d , height : %d\n",width,height);
 fseek(bmpfp,2,SEEK_CUR);
    fread(&bitCount,sizeof(bitCount),1,bmpfp);
    fseek(bmpfp,10,SEEK_SET); 
 fread(&offbits,sizeof(int),1,bmpfp);
   
 if(bitCount==24){
        bitPerLine = ( (width*3)%4==0 ) ? width*3 : ( (width*3)/4 )*4 + 4;
     while(1){
   printf("请输出坐标：");
   scanf("%d%d",&x,&y);
   if(x>width||y>height) return 0;
            fseek(bmpfp, 18 + offbits + bitPerLine * y + 3*x  , SEEK_SET);
    fread(&data,sizeof(data),1,bmpfp);
   printf("该点蓝色分量：%d",data);
            fread(&data,sizeof(data),1,bmpfp);
   printf("该点绿色分量：%d",data);
   fread(&data,sizeof(data),1,bmpfp);