C++ splitting string input into two ints

Question

How do I split a string input into two different ints?

I am writing a program to input two different fractions (like 2/3) and am wanting to read in the 2/3 as a string and split it by a delimiter (the /).

Example:

Input: 2/3
Values:
int num = 2;
int denom = 3;

Example 2:

Input: 11/5
Values:
int num = 11;
int denom = 5;

Thanks!

Well you can do: stackoverflow.com/questions/14265581/… to split the string and you can do stackoverflow.com/questions/194465/… to convert the strings to an int. — AresCaelum
– AresCaelum, Commented Apr 5, 2017 at 16:06
For simple tasks you can do this int a, b; char c; std::cin >> a >> c >> b; — Logman
– Logman, Commented Apr 5, 2017 at 16:09
I forgot to add that you can use stringstream object instead cin — Logman
– Logman, Commented Apr 5, 2017 at 16:16

Catch_0x16 · Accepted Answer · 2017-04-05 16:10:51Z

1

For something quite simple like "2/3" you could use string.find and string.substr

string.find will return the position in your string that the '/' character resides. You can then use string.substr to split the string both before and after the '/' character. Don't have time to write a code example but if you're really stuck, PM me and I'll knock something up when I get home.

answered Apr 5, 2017 at 16:10

Catch_0x16

3071 gold badge5 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Srini · Accepted Answer · 2017-04-05 16:18:37Z

0

Run the following with the -std=c++ 11 flag specified if using g++.

#include <iostream>
#include <string>

void find_num_denom(int& num, int& denom, std::string input) {
    int slash_index = input.find("/");
    num = std::stoi(input.substr(0, slash_index));
    denom = std::stoi(input.substr(slash_index + 1, input.length()));
}

int main() {
    int n,d;
    find_num_denom(n, d, "23/52");
    std::cout<<n<<"  "<<d<<"\n";
    return 0;
}

this returns 23 52 for me. Let me know if you have any problems

answered Apr 5, 2017 at 16:18

Srini

1,6571 gold badge21 silver badges37 bronze badges

Collectives™ on Stack Overflow

C++ splitting string input into two ints

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related