int型转二进制,八进制,十六进制查表法

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#include <stdio.h>void toBinary(int num);void toOct(int num);void toHex(int num);void total(int num, int base, int offset);void toBinary2(int num);void toOct2(int num);void toHex2(int num);int main(int argc, const char * argv[]){    toBinary(12);    toOct(12);    toHex(12);    toBinary2(12);    toOct2(12);    toHex2(12);    return 0;}void toBinary2(int num){    total(num, 1, 1);}void toOct2(int num){    total(num, 7, 3);}void toHex2(int num){    total(num, 15, 4);}void total(int num, int base, int offset){    char cs[16] = {        '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'    };    char rs[32];    int len = sizeof(rs) / sizeof(char);    int pos = len;        while (num) {        int result = num & base;        rs[--pos] = cs[result];        num = num>>offset;    }        for (int i = pos; i<len; i++) {        printf("%c", rs[i]);    }        printf("\n");}// 转二进制void toBinary(int num){    char cs[2] = {'0','1'};    char rs[32];    int len = sizeof(rs) / sizeof(char);    int pos = len; // 32        while (num != 0) {        int result = num & 1;        rs[--pos] = cs[result];        num = num>>1;    }        for (int i = pos; i<len; i++) {        printf("%c", rs[i]);    }    printf("\n");    }// 转八进制void toOct(int num){    char cs[8] = {        '0','1','2','3','4','5','6','7'    };        char rs[11];    int len = sizeof(rs) / sizeof(char);    int pos = len; // 11;        while (num != 0) {        int result = num & 7;        rs[--pos] = cs[result];        num = num>>3;    }        for (int i = pos; i<len; i++) {        printf("%c", rs[i]);    }        printf("\n");}// 转十六进制void toHex(int num){    char cs[16] = {        '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'    };    char rs[8];    int len = sizeof(rs) / sizeof(char);    int pos = len;        while (num != 0) {        int result = num & 15;        rs[--pos] = cs[result];        num = num>>4;    }        for (int i = pos; i<len; i++) {        printf("%c", rs[i]);    }        printf("\n");}
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