Question

How to check if a number contains identical digits in C++

Answer 1

#include <algorithm>
#include <iostream>
#include <sstream>
#include <string>
#include <set>
 
bool isNumberContainIdenticalDigits(const std::string& str) {
    std::set<char> set(str.begin(), str.end());
         
    return set.size() == 1;
}
 
int main() {
    int n = 999999;
 
    std::ostringstream oss;
    oss << n;
    std::string s = oss.str();
 
    if (isNumberContainIdenticalDigits(s)) {
        std::cout << "yes" << std::endl;
    } else {
        std::cout << "no" << std::endl;
    }
}
 
 
 
/*
run:
  
yes
  
*/

 

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