C#

char a = 65;   // = 'A'
int i = 'A';   // i = 65
int z = 5;
z += a;        // z = 70

#include <stdio.h>
#include <stdlib.h>

void main( void )
{
  char c = 'A';
  char d = '4';
  int i = 0;

  printf( "Character '%c' is %d in ascii.\n", c, c );
  printf( "Character '%c' is %d in ascii.\n", d, d );
  printf( "Character '%c' is %d as an integer.\n", d, atoi( &d ) );
}

Character 'A' is 65 in ascii.
Character '4' is 52 in ascii.
Character '4' is 4 as an integer.

int inputnr;
int ten;
int one;


ten = (int) inputnr / 10;
one = inputnr % 10;

cout << ten << "\n" << one;