#include "leetcode.h" class Solution { public: int percentageLetter(string s, char letter) { int n = s.size(); int freq = 0; for (int i = 0; i < n; i++) if (s[i] == letter) freq++; return (freq * 100) / n; } }; int main() { string s = "foobar"; char letter = 'o'; Solution obj; cout << obj.percentageLetter(s, letter); }