Generate bmp image with C.

bmpsetting.h

typedef struct BitMapFileHeader{
	const unsigned short Reserve;
	const unsigned short FileType;// = 0x424D; //BM
	unsigned int   FileSize;
	const unsigned short Reserve1;// = 0x00;
	const unsigned short Reserve2;// = 0x00;
	const unsigned int   DateOffSet;//  = 0x3E;
} BMPFileHeader;

typedef struct BitMapInfoHeader{
	const unsigned int   ThisSize;// = 0x28;
	int   ImgWidth;
	int   ImgHeight;
	const unsigned short PlainNum;// = 0x01;
	const unsigned short BitPerPx;// = 0x01;
	const unsigned int   CompressType;// = 0x00;
	unsigned int   ImgDateSize;
	const unsigned int   HorizontalDpi;// = 0x00;
	const unsigned int   VerticalDpi;// = 0x00;
	const unsigned int   ColorIndex;// = 0x02;
	const unsigned int   PrincipalIndex;// = 0x00;
} BMPInfoHeader;

typedef struct ColorPalette{
	const unsigned char Red;
	const unsigned char Green;
	const unsigned char Blue;
	const unsigned char Reserve;
} ColorPalette;

BMPFileHeader InitializeFileHeader(){
	BMPFileHeader bmpFH = {
		0x00,
		0x4D42, //FileType
		0x00,   //FileSize
		0x00,   //Reserve1
		0x00,   //Reserve2
		0x3E    //DateOffSet
	};
	return bmpFH;
}

BMPInfoHeader InitializeInfoHeader(){
	BMPInfoHeader bmpIH = {
		0x28,  //ThisSize
		0x00,  //ImgWidth
		0x00,  //ImgHeight
		0x01,  //PlainNum
		0x01,  //BitPerPx
		0x00,  //CompressType
		0x00,  //ImgDateSize
		0x00,  //HorizontalDpi
		0x00,  //VerticalDpi
		0x02,  //ColorIndex
		0x00   //PrincipalIndex
	};
	return bmpIH;
}

Source.cpp

//中京と書いてあるbmp画像を生成するプログラムです。

#include<stdio.h>
#include"bmpsetting.h"

int main(void){

	FILE *BMPfp;
	errno_t error;
	if (error = fopen_s(&BMPfp, "test.bmp", "wb") != 0)
		return error;
	int sfsdaf[10][18] = 
	{ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1 },
	  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1 },
	  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
	  { 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1 },
	  { 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1 },
	  { 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1 },
	  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1 },
	  { 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1 },
	  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1 },
	  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1 } };
	BMPFileHeader bmpFH = InitializeFileHeader();
	BMPInfoHeader bmpIH = InitializeInfoHeader();
	ColorPalette  colP[2] = {
		{ 0x00, 0x00, 0x00, 0x00 }, //Black
		{ 0xFF, 0xFF, 0xFF, 0x00 }  //White
	};

	bmpIH.ImgHeight =  0x0A;
	bmpIH.ImgWidth  =  0x12;
	unsigned int ByteperImgLine = ((0x12 / 8) + 1) + 1;
	bmpIH.ImgDateSize = 0x0A * ByteperImgLine;
	bmpFH.FileSize = bmpFH.DateOffSet + bmpIH.ImgDateSize;


	fwrite((char*)&bmpFH + 2, sizeof(BMPFileHeader)-2, 1, BMPfp);
	fwrite(&bmpIH, sizeof(BMPInfoHeader), 1, BMPfp);
	fwrite(colP, sizeof(ColorPalette), 2, BMPfp);

	unsigned int num;
	char zero = 0;
	for (int row = 0; row < 10; row++){
		num = 0;
		for (int column = 0; column < 18; column++){
			num = num * 2 + sfsdaf[9 - row][column];
		}
		fwrite(&num, sizeof(int), 1, BMPfp);
	}
	
	fclose(BMPfp);
	return 0;

}

hello, when the width is greater than 33 (decimal) it stops working 😞