Day 08 of 100 Days of Code: Basic Math and Leet code questions

I did 3 Basic Math questions on leetcode- reverse, palindrome and counting digits that are divisible as a continuation to the sheet. I found the counting digits that are divisible quite interesting.

i ran into an error when I ran the reverse question

Line 7: Char 22: runtime error: signed integer overflow: 964632435 * 10 cannot be represented in type 'int' (solution.cpp) SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior solution.cpp:7:22

Basically, the integer goes beyond the max so there's an overflow, you can fix this by returning 0 when the digit is close to int max.

class Solution {
public:
    int reverse(int x) {
        int rev = 0;
        while(x!=0){
            int lastdigit = x % 10;
            if((rev> INT_MAX/10)||(rev<INT_MIN/10)){
                return 0;
            }
            rev = rev*10 + lastdigit;
            x=x/10;
        }
        return rev;
    }
};

Anyways Keep Coding #Noobcodergang