1 #include <iostream>
2 using namespace std;
3 char *my_reverse(char* s)
4 {
5 char *p,*q;
6 p=s;q=s;
7 while(*q!='\0')
8 q++;
9 q--;
10 char temp;
11 while(q>=p)
12 {
13 temp=*q;
14 *q--=*p;
15 *p++=temp;
16 }
17 return s;
18 }
19 char* my_itoa(int num)
20 {
21 static char s[100];
22 int i=0;
23 int isNegative=num;
24 if(isNegative<0)
25 num*=-1;
26 while(num)
27 {
28 s[i]=num%10+'0';
29 num/=10;
30 i++;
31 }
32 if(isNegative<0)
33 s[i++]='-';
34 s[i]='\0';
35 return my_reverse(s);
36 }
37 int main()
38 {
39 int num=123;
40 cout<<my_itoa(num)<<endl;
41 system("pause");
42 return 0;
43 }
