99/*
1010 * NOTE: We could have made i a static variable; however, that is problematic
1111 * because its value will persists throughout the entire life of the program, and
12- * thus, multiple calls to itoa will use the value of i from the previous call,
12+ * thus, multiple calls to itoar will use the value of i from the previous call,
1313 * which will result in an undesirable outcome.
1414 */
1515
2020#define MAXLEN 1000
2121
2222/* functions */
23- int itoa (unsigned , char [], int );
23+ void itoa (int , char []);
24+ int itoar (int , char [], int );
2425
25- int itoa (unsigned n , char s [], int i )
26+ /* itoa: interface function to itoar */
27+ void itoa (int n , char s [])
2628{
27- int sign ;
29+ itoar (n , s , 0 );
30+ }
2831
29- if ((sign = n ) < 0 ) {
32+ /* itoar: convert n to characters in s, recursive version */
33+ int itoar (int n , char s [], int i )
34+ {
35+ if (n < 0 ) {
3036 s [i ++ ] = '-' ;
3137 n = - n ;
3238 }
3339 if (n / 10 )
34- i = itoa (n / 10 , s , i ); /* recursive call */
40+ i = itoar (n / 10 , s , i ); /* recursive call */
3541 s [i ++ ] = n % 10 + '0' ;
3642 s [i ] = '0円' ;
3743 return i ; /* return the updated value of i */
@@ -41,16 +47,16 @@ int main(void)
4147{
4248 char str [MAXLEN ];
4349
44- itoa (996 , str , 0 );
50+ itoa (996 , str );
4551 printf ("%s\n" , str );
4652
47- itoa (-2345 , str , 0 );
53+ itoa (-2345 , str );
4854 printf ("%s\n" , str );
4955
50- itoa (INT_MAX , str , 0 );
56+ itoa (INT_MAX , str );
5157 printf ("%s\n" , str );
5258
53- itoa (INT_MIN , str , 0 );
59+ itoa (INT_MIN , str );
5460 printf ("%s\n" , str );
5561
5662 return 0 ;
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