Say I have an integer and I want to convert it to a character? What methods are available or should I use in C++? For example, refer to the given code below
#include <bits/stdc++.h>
using namespace std;
int main
{
int i = 1;
// Say I want to convert 1 to a char '1';
// How do I achieve the following in C++
}
You could use an array, which should be easy to understand:
if (i >= 0 && i <= 9) {
char digits[] = "0123456789";
char c = digits[i];
Or you can use addition which is slightly trickier to understand. It relies on the (guaranteed) detail that digit symbols are contiguous in the character encoding:
if (i >= 0 && i <= 9) {
char c = i + '0';
A safe way is to use std::stoi(), https://en.cppreference.com/w/cpp/string/basic_string/stol
you have all the benefit of using a safe string type (std::string), and stoi will throw exceptions when you have incorrect input.
#include <string>
int main()
{
std::string txt("123");
auto value = std::stoi(txt);
}
Also try not to use #include <bits/stdc++.h> https://stackoverflow.com/Questions/31816095/Why-Should-I-Not-Include-Bits-Stdc-H.