C++ Output

[Hugetanks]

Hello, I just started learning C++ for competitive programming, and I'm confused with what my output gives me. Can someone tell me what's wrong with my code?

c++:

#include <iostream> int main() {     int longer, counter = 0;     char dummy;     std::cin>>longer;     char num[80];         for (int i = 0; i < longer; i++)     {         std::cin.getline(num,80);         dummy = num[0];         for (int k = 0; k < sizeof(num)/sizeof(num[i]); k++)         {             if (num[k] == dummy)                 counter++;             else             {                 std::cout << counter << " " << dummy << " ";                 dummy = num[k];                 counter = 0;             }         }         std::cout<<"\n";     }             return 0; }

It's for this question: https://dmoj.ca/problem/ccc19j3 Thanks![/syntax]