SDL 2.0 Keyboard Handling - c++

Question

I am writing a very simple sample program that simply shows you "a key is pressed or not" only once, the key pressed event is triggered whenever i press any number of keys (either i press one key, two keys or more), while the key is released event is triggered when an SDL_KEYUP event is occurred while the number of keys pressed is only 1 key, this example works perfectly on arrow keys, however for the other keys whenever i press multiple keys and release only one of them a "Key is released" message is triggered followed by "a key is pressed", i failed to locate the problem with this.
my Code:
#include <iostream>
#include <SDL2/SDL.h>
using namespace std;
SDL_Event input;
int main(int argc, const char * argv[])
{
SDL_Init(SDL_INIT_EVERYTHING);
int y = 0;
int z = 0;
int w = 0;
bool key = false;
const Uint8 *state = SDL_GetKeyboardState(NULL);
while (1){
w = 0;
SDL_PollEvent(&input);
//check for events generated
switch (input.type) {
case SDL_KEYDOWN:
key = true;
break;
case SDL_KEYUP:
key = false;
break;
default:
break;
}
// Check for no. of keys pressed using ASCII code
for (y = 48;y<=127;y++)
if(state[y] == 1)
w++;
// Display the messages
if (key && z==0 )
{
cout << "Key is Pressed" << endl;
z = 1;
}
else if (!key && w < 1 && z==1)
{
cout << "Key is released" << endl;
z = 0;
}
}
return 0;
}

Answer 1

The problem was with the initialization of the for loop, SDL 2 does not use the same ASCII enumerations for characters thus my code tend to ignore the code enumerations outside the (48-127) range after changing the code to:
for (y = 0;y<=127;y++)
if(state[y] == 1)
w++;
the problem is solved