c++ convert int to char code example

Example 1: COnvert string to char * C++

// CPP program to convert string 
// to char array 
#include <bits/stdc++.h> 
  
using namespace std; 
  
// driver code 
int main() 
{ 
    // assigning value to string s 
    string s = "geeksforgeeks"; 
  
    int n = s.length(); 
  
    // declaring character array 
    char char_array[n + 1]; 
  
    // copying the contents of the 
    // string to char array 
    strcpy(char_array, s.c_str()); 
  
    for (int i = 0; i < n; i++) 
        cout << char_array[i]; 
  
    return 0; 
}

Example 2: integer to char c++

// for example you have such integer
int i = 3;

// and you want to convert it to a char so that
char c = '3';

what you need to do is, by adding i to '0'. The reason why it works is because '0' actually means an integer value of 48. '1'..'9' means 49..57. This is a simple addition to find out corresponding character for an single decimal digit integer:

i.e. char c = '0' + i;

If you know how to convert a single decimal digit int to char, whats left is how you can extract individual digit from a more-than-one-decimal-digit integer

it is simply a simple math by making use of / and %

int i = 123 % 10;  // give u last digit, which is 3
int j = 123 / 10;  // give remove the last digit, which is 12
The logic left is the homework you need to do then.

Example 3: C++ int to char*

std::string s = std::to_string(number);
char const *pchar = s.c_str();  //use char const* as target type