c++ 编写函数char itos(int n,char *str)实现把整数转成字符串

#include 

using namespace std;
//2.编写函数char itos(int n,char *str)实现把整数转成字符串
char* itos(int n,char *str){
    int i=0;
    if(n<0){
        n = -1 * n;
        str[i++] = '-';
    }

    while(n!=0){
        str[i++] = n %10+48;
        n = n/10;
    }
    str[i] = '';
    if(str[0]=='-'){
        for(int j=1,x=i-1;j