Answers for "cpp char to int"

convert char to int c++

char a = '6'; //bounded by 0 and 9
int n1 = a - '0'; 
int n2 = a - 48; 
int n3 = std::stoi(&a);

string to int c++

// stoi example
#include <iostream>   // std::cout
#include <string>     // std::string, std::stoi

int main ()
{
  std::string str_dec = "2001, A Space Odyssey";
  std::string str_hex = "40c3";
  std::string str_bin = "-10010110001";
  std::string str_auto = "0x7f";

  std::string::size_type sz;   // alias of size_t

  int i_dec = std::stoi (str_dec,&sz);
  int i_hex = std::stoi (str_hex,nullptr,16);
  int i_bin = std::stoi (str_bin,nullptr,2);
  int i_auto = std::stoi (str_auto,nullptr,0);

  std::cout << str_dec << ": " << i_dec << " and [" << str_dec.substr(sz) << "]n";
  std::cout << str_hex << ": " << i_hex << 'n';
  std::cout << str_bin << ": " << i_bin << 'n';
  std::cout << str_auto << ": " << i_auto << 'n';

  return 0;
}

char to string c++

std::cout << std::string(1, c) << std::endl;

char* to int in cpp

int x = std::stoi("42")

char to int in c++

char a = '4';
int ia = a - '0';

convert char to int c++

int x = character - '0'