C++ converting string into integer

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Greetings everybody,

I am currently trying to make a program that can will convert a string that is input by a user into a int.
I want this integer to be up to 4,294,967,295. I am currently using stoi to convert the string into an unsigned int, but everytime I try to input a number that is 10 digits long, an error "abort() has been called" pops up. I've come here to figure out what the issue is with my code.

C++

#include <iostream>
#include <string>

using namespace std;

int main()
{

	cout << "4,294,967,295" << endl;
	string numberString;
	
	getline(cin, numberString);

	unsigned int number = stoi(numberString);

	cout << number << endl;

	return 0;
}

Thanks in advance!

Regards

What I have tried:

I've tried using unsigned long, double but both do not work

Posted 7-Jul-18 21:49pm

Member 13899738

Updated 7-Jul-18 23:16pm

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Peter_in_2780 · Accepted Answer · 2018-07-07T22:30:00

That 4.... number is 2^32-1, which is beyond the range of a 32 bit int, the return type of stoi. It is the largest number that can be expressed as an UNSIGNED int, so you need to use stoul or something else that will return numbers bigger than a signed int. Alternatively, you could use sscanf with a conversion like %u or something "bigger".

Shao Voon Wong · Accepted Answer · 2018-07-07T22:25:00

stoi is for converting signed 32 bit integer whose maximum value it can hold is 2,147,483,647. You should catch the out_of_range exception thrown from stoi. And please remove the commas in your number string.

std::stoi, std::stol, std::stoll - cppreference.com[^]

Another alternative is to use string streams to convert your strings to numbers.

C++

#include <sstream>
#include <iostream>

int main()
{
	unsigned int n = 0;
	std::istringstream oss("4294967295");
	oss >> n;
	std::cout << n << std::endl;
    return 0;
}

C++ converting string into integer

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