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c語言用字母畫出正弦波,C語言查表法實作DA正弦波輸出

// 呼呼.cpp : Defines the entry point for the console

application.

//

#include "stdafx.h"

#include

#define pi 3.1415926

int _tmain(int argc, _TCHAR* argv[])

{

FILE *fp=fopen("D:\\t.txt","a+");

int i;

int shuzu[720];

for(i=0;i<720;i++)

{

double j = i * pi / 360;

double y = sin(j);

int z = 128 * y+128;

shuzu[i]=z;

fprintf(fp, "0x%x,",shuzu[i]);

}

return 0;

}

//--------分隔線-------------------

附2:半周期0-255正弦表[360點][分辨率0.5度]

0x0,0x2,0x4,0x6,0x8,0xb,0xd,0xf,0x11,0x14,0x16,0x18,0x1a,0x1c,0x1f,0x21,0x23,0x25,0x27,0x2a,0x2c,0x2e,0x30,0x32,0x35,0x37,0x39,0x3b,0x3d,0x3f,0x41,0x44,0x46,0x48,0x4a,0x4c,0x4e,0x50,0x53,0x55,0x57,0x59,0x5b,0x5d,0x5f,0x61,0x63,0x65,0x67,0x69,0x6b,0x6d,0x6f,0x71,0x73,0x75,0x77,0x79,0x7b,0x7d,0x7f,0x81,0x83,0x85,0x87,0x89,0x8a,0x8c,0x8e,0x90,0x92,0x94,0x95,0x97,0x99,0x9b,0x9c,0x9e,0xa0,0xa2,0xa3,0xa5,0xa7,0xa8,0xaa,0xac,0xad,0xaf,0xb1,0xb2,0xb4,0xb5,0xb7,0xb8,0xba,0xbc,0xbd,0xbe,0xc0,0xc1,0xc3,0xc4,0xc6,0xc7,0xc8,0xca,0xcb,0xcc,0xce,0xcf,0xd0,0xd2,0xd3,0xd4,0xd5,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xdf,0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xee,0xef,0xf0,0xf1,0xf1,0xf2,0xf3,0xf3,0xf4,0xf5,0xf5,0xf6,0xf6,0xf7,0xf7,0xf8,0xf8,0xf9,0xf9,0xfa,0xfa,0xfb,0xfb,0xfb,0xfc,0xfc,0xfc,0xfd,0xfd,0xfd,0xfd,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfd,0xfd,0xfd,0xfd,0xfc,0xfc,0xfc,0xfb,0xfb,0xfb,0xfa,0xfa,0xf9,0xf9,0xf8,0xf8,0xf7,0xf7,0xf6,0xf6,0xf5,0xf5,0xf4,0xf3,0xf3,0xf2,0xf1,0xf1,0xf0,0xef,0xee,0xee,0xed,0xec,0xeb,0xea,0xe9,0xe8,0xe8,0xe7,0xe6,0xe5,0xe4,0xe3,0xe2,0xe1,0xe0,0xdf,0xdd,0xdc,0xdb,0xda,0xd9,0xd8,0xd7,0xd5,0xd4,0xd3,0xd2,0xd0,0xcf,0xce,0xcc,0xcb,0xca,0xc8,0xc7,0xc6,0xc4,0xc3,0xc1,0xc0,0xbe,0xbd,0xbc,0xba,0xb8,0xb7,0xb5,0xb4,0xb2,0xb1,0xaf,0xad,0xac,0xaa,0xa8,0xa7,0xa5,0xa3,0xa2,0xa0,0x9e,0x9c,0x9b,0x99,0x97,0x95,0x94,0x92,0x90,0x8e,0x8c,0x8a,0x89,0x87,0x85,0x83,0x81,0x7f,0x7d,0x7b,0x79,0x77,0x75,0x73,0x71,0x6f,0x6d,0x6b,0x69,0x67,0x65,0x63,0x61,0x5f,0x5d,0x5b,0x59,0x57,0x55,0x53,0x50,0x4e,0x4c,0x4a,0x48,0x46,0x44,0x41,0x3f,0x3d,0x3b,0x39,0x37,0x35,0x32,0x30,0x2e,0x2c,0x2a,0x27,0x25,0x23,0x21,0x1f,0x1c,0x1a,0x18,0x16,0x14,0x11,0xf,0xd,0xb,0x8,0x6,0x4,0x2,0x0,