Решение задачи If 27

#include <stdio.h>

int main(void)
{
   float x;
   printf("x: ");
   scanf ("%f", &x);

   if (x<0) printf("fx=%i\n",0);
   else if (( ((int)x)%2 ) ==0 ) printf("fx=%i\n",1);
   else printf("fx=%i\n",-1);


   return 0;
}

import math

x = -1
while x < 11:
    x_floor = math.floor(x)
    if x < 0:
        y = 0
    elif x_floor%2 == 0:
        y = 1
    else:
        y = -1
    print("x = {0} : f(x) = {1}".format(x,y))
    x += .5
									

program if27;
var
  X: Real;
begin
  Write('Введите X: ');
  Readln (X);
 if x<0 then  Writeln('F(x)=',0);
 if ((Trunc(x) mod 2) = 0)  then  Writeln('F(x)=',1);
 if ((Trunc(x) mod 2) <> 0)  then  Writeln('F(x)=',-1);
end.
									

import math
x = float(input())
x = math.floor(x)
if x < 0:
    y = 0
elif x % 2 == 0:
    y = 1
else:
    y = -1
print(y)