my_itoa

#include <iostream>
using namespace std;
char *my_reverse(char* s)
{
    char *p,*q;
    p=s;q=s;
    while(*q!='')
        q++;
    q--;
    char temp;
    while(q>=p)
    {
        temp=*q;
        *q--=*p;
        *p++=temp;
    }
    return s;
}
char* my_itoa(int num)
{
    static char s[100];
    int i=0;
    int isNegative=num;
    if(isNegative<0)
        num*=-1;
    while(num)
    {
        s[i]=num%10+'0';
        num/=10;
        i++;
    }
    if(isNegative<0)
        s[i++]='-';
    s[i]='';
    return my_reverse(s);
}
int main()
{
    int num=123;
    cout<<my_itoa(num)<<endl;
    system("pause");
    return 0;
}