Question

How to delete the N digit of a number in C++

Answer 1

#include <iostream>
#include <sstream> 

int main() {
    int number = 873152;
    int N = 4;
       
    std::string s = std::to_string(number);
    std::string beforeN = s.substr(0, N - 1);
    std::string afterN = s.substr(N, s.length() - N); 
      
    std::istringstream(beforeN + afterN) >> number;

    std::cout << number;
}



/*
run:

87352

*/

 

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