Question

How to get the last digit of float number in C++

Answer 1

#include <iostream>
#include <sstream>

using namespace std;


int main() 
{
    double d = 23.8713;

    ostringstream os;
    
    os << d;
    
    string s = os.str();

    int last_digit = s.at(s.length() - 1) - '0';
    
    cout << last_digit;
}




/*
run:

3

*/

 

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Answer 2

#include <iostream>
#include <sstream>

using namespace std;


int main() 
{
    double d = 23.871;

    ostringstream os;
    
    os << d;
    
    string s = os.str();

    int last_digit = s[s.length() - 1] - '0';
    
    cout << last_digit;
}




/*
run:

1

*/

 

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