《c程序设计语言》读书笔记-3.5-按要求进制位数字转字符串

#include <io.h>#include <stdio.h>#include <string.h>#include <stdlib.h>#include <math.h>void reverse(char s[]){    int c,i,j;    for(i = 0,j = strlen(s) - 1;i < j;i++,j--)        c = s[i],s[i] = s[j],s[j] = c;}void itoa(int n,char s[],int b){    int i,sign,j;    sign = n,i = 0;    do    {        j =  abs(n % b);        s[i++] = (j <= 9) ? j + '0' : j - 10 + 'a';    }while((n /= b) != 0);    if(sign < 0)        s[i++] = '-';        s[i] = '\0';        reverse(s);}int main(){    int n,i,b;    char s[50];    n = -165;    b = 16;    itoa(n,s,b);    for(i = 0;i < strlen(s);i++)        printf("%c  ",s[i]);return 0;}