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#include <stdio.h>
 
int main(void) {
int x; 
float y;
 
while( x > 0)
{
    printf("Enter any integer:\n"); 
    scanf("%d", &x);
    // x is an even number if is perfectly divisible by 2
    if (x%2 == 0)
   {
   y= (float)x*(float)x;
   printf("y= %f\n");
 
    //x is an odd number if it is not perfectly divisible by 2
   else if (x%2 != 0)
   {
   y=(float)x+2; 
   printf("y= %f\n"); 
   }
   else 
   printf("Invalid entry, only positive integers accepted\n");
   }
}
return 0; 
}
 

prog.c: In function ‘main’:
prog.c:15:16: warning: format ‘%f’ expects a matching ‘double’ argument [-Wformat=]
    printf("y= %f\n");
                ^
prog.c:18:4: error: expected ‘}’ before ‘else’
    else if (x%2 != 0)
    ^~~~
prog.c:21:16: warning: format ‘%f’ expects a matching ‘double’ argument [-Wformat=]
    printf("y= %f\n");
                ^
prog.c:5:7: warning: variable ‘y’ set but not used [-Wunused-but-set-variable]
 float y;
       ^
prog.c: At top level:
prog.c:27:1: error: expected identifier or ‘(’ before ‘return’
 return 0;
 ^~~~~~
prog.c:28:1: error: expected identifier or ‘(’ before ‘}’ token
 }
 ^

Standard output is empty