#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<string.h>  
void  itoa(int n, char *buf)
{
	int count = 0;
	char nu;
	char buf2[128] = { 0 };
	//核心算法很简单 就是每次取出各位数字然后把数字转存进数组,中间有一个数组匿置的过程
	do
	{
		nu = n % 10 + ‘0‘;
		buf2[count] = nu;
		n = n / 10;
		count++;
	} while (n != 0);
	for (int i = count, j = 0; i >= 0; i--, j++)
	{
		buf[j] = buf2[i - 1];
		count++;
	}

}

void main()
{
	int num = 123456;
	char buf[128] = { 0 };
	itoa(num, buf);

	printf("%s", buf);
	system("pause");
}