uva 10035 wrong.c

uva 10035 wrong.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/*
carry = add1%10 + add2%10 + carry;
      carry /= 10;
      add1 /= 10;
      add2 /= 10;
      if( carry )
        count++;
*/

int main()
{
    char inp[30];
    while(fgets(inp, 30, stdin)) {
        char *number1, *number2;

        number1 = strtok(inp, " ");
        number2 = strtok(NULL, "\n");

        if(atoi(number1) == 0 || atoi(number2) == 0)
            break;

        int min_length = (strlen(number1) > strlen(number2)) ? \
                         strlen(number2) : strlen(number1);

        int i, count = 0, carry = 0;
        for(i = 0; i < min_length; i++) {
            int sum = number1[strlen(number1) - 1 - i] - '0' + number2[strlen(number2) - 1 - i] - '0' + carry;
            if(sum > 9) {
                count++;
                carry = 1;
            } else
                carry = 0;
        }
        
        
        //wrong 999 99999999
        if((int)strlen(number1) == (int)min_length) {
            if(number2[strlen(number2) - 1 - i] == '9'&& carry == 1) {
                count += 2;
            }
        } else if((int)strlen(number2) == (int)min_length) {
            if(number1[strlen(number1) - 1 - i] == '9' && carry == 1) {
                count += 2;
            }
        }

        if(count == 0)
            printf("No carry operation.\n");
        else if(count == 1)
            printf("1 carry operation.\n");
        else
            printf("%d carry operations.\n", count);
    }

    return 0;
}