from char to int c code example

Example 1: turn a char into an int in c

int x = character - '0';

Example 2: c char to int

int i;
char c = 'A'; 
i = (int)c;

Example 3: converting char to int in c++

#include <sstream>

using namespace std;

int main()
{
    stringstream str;
    
    str << "1";

    double x;
    str >> x;
}