8ビットの並びを逆転して遊ぶ (テーブルを作る)

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プログラム

オンラインコンパイラpaiza

#include <iostream>
using namespace std;
int main(void){
    // Your code here!
    
    printf("unsigned char rev[] = {\n");
    
    
    for(int i=0;i<(0xff+1);i++){
    
        int a = i;
        a = (a & 0b10000000) >> 7 |
            (a & 0b01000000) >> 5 |
            (a & 0b00100000) >> 3 |
            (a & 0b00010000) >> 1 |
            (a & 0b00001000) << 1 |
            (a & 0b00000100) << 3 |
            (a & 0b00000010) << 5 |
            (a & 0b00000001) << 7;
            
        printf("0x%02x%c\n",a,(i == 255) ? ' ' : ',');
    
    }//for
    
    printf("};\n");
    
}

unsigned char rev[] = {
0x00,
0x80,
0x40,
0xc0,
0x20,
0xa0,
0x60,
0xe0,
0x10,
0x90,
0x50,
0xd0,
0x30,
0xb0,
0x70,
0xf0,
0x08,
0x88,
0x48,
0xc8,
0x28,
0xa8,
0x68,
0xe8,
0x18,
0x98,
0x58,
0xd8,
0x38,
0xb8,
0x78,
0xf8,
0x04,
0x84,
0x44,
0xc4,
0x24,
0xa4,
0x64,
0xe4,
0x14,
0x94,
0x54,
0xd4,
0x34,
0xb4,
0x74,
0xf4,
0x0c,
0x8c,
0x4c,
0xcc,
0x2c,
0xac,
0x6c,
0xec,
0x1c,
0x9c,
0x5c,
0xdc,
0x3c,
0xbc,
0x7c,
0xfc,
0x02,
0x82,
0x42,
0xc2,
0x22,
0xa2,
0x62,
0xe2,
0x12,
0x92,
0x52,
0xd2,
0x32,
0xb2,
0x72,
0xf2,
0x0a,
0x8a,
0x4a,
0xca,
0x2a,
0xaa,
0x6a,
0xea,
0x1a,
0x9a,
0x5a,
0xda,
0x3a,
0xba,
0x7a,
0xfa,
0x06,
0x86,
0x46,
0xc6,
0x26,
0xa6,
0x66,
0xe6,
0x16,
0x96,
0x56,
0xd6,
0x36,
0xb6,
0x76,
0xf6,
0x0e,
0x8e,
0x4e,
0xce,
0x2e,
0xae,
0x6e,
0xee,
0x1e,
0x9e,
0x5e,
0xde,
0x3e,
0xbe,
0x7e,
0xfe,
0x01,
0x81,
0x41,
0xc1,
0x21,
0xa1,
0x61,
0xe1,
0x11,
0x91,
0x51,
0xd1,
0x31,
0xb1,
0x71,
0xf1,
0x09,
0x89,
0x49,
0xc9,
0x29,
0xa9,
0x69,
0xe9,
0x19,
0x99,
0x59,
0xd9,
0x39,
0xb9,
0x79,
0xf9,
0x05,
0x85,
0x45,
0xc5,
0x25,
0xa5,
0x65,
0xe5,
0x15,
0x95,
0x55,
0xd5,
0x35,
0xb5,
0x75,
0xf5,
0x0d,
0x8d,
0x4d,
0xcd,
0x2d,
0xad,
0x6d,
0xed,
0x1d,
0x9d,
0x5d,
0xdd,
0x3d,
0xbd,
0x7d,
0xfd,
0x03,
0x83,
0x43,
0xc3,
0x23,
0xa3,
0x63,
0xe3,
0x13,
0x93,
0x53,
0xd3,
0x33,
0xb3,
0x73,
0xf3,
0x0b,
0x8b,
0x4b,
0xcb,
0x2b,
0xab,
0x6b,
0xeb,
0x1b,
0x9b,
0x5b,
0xdb,
0x3b,
0xbb,
0x7b,
0xfb,
0x07,
0x87,
0x47,
0xc7,
0x27,
0xa7,
0x67,
0xe7,
0x17,
0x97,
0x57,
0xd7,
0x37,
0xb7,
0x77,
0xf7,
0x0f,
0x8f,
0x4f,
0xcf,
0x2f,
0xaf,
0x6f,
0xef,
0x1f,
0x9f,
0x5f,
0xdf,
0x3f,
0xbf,
0x7f,
0xff 
};