1.生成BMP图片

原文：/wurui1994/p/5965920.html

在学习图形图像的过程中，最简单和常见的格式是BMP和PPM。下面将给出生成BMP的极度精简代码，然后讲解BMP格式。

#include <stdio.h>#include <stdlib.h>#define w 200#define h 200void WriteBMP(char*img,const char* filename){int l=(w*3+3)/4*4;int bmi[]= {l*h+54,0,54,40,w,h,1|3*8<<16,0,l*h,0,0,100,0};FILE *fp = fopen(filename,"wb");fprintf(fp,"BM");fwrite(&bmi,52,1,fp);fwrite(img,1,l*h,fp);fclose(fp);}int main(){char img[w*h*3];for(int i=0; i<w*h*3; i++)img[i]=rand()%256;WriteBMP(img,"test.bmp");system("test.bmp");return 0;}

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