Prata chapter 5 exc 9

#include <stdio.h>

//short version
//suppose to scan into float and print it, till instead of float will be entered 'q'
//MISTAKE it goes in endless cycle instead, once 'q ' is entered
//longer version with possibility to see, how it works is here
// https://pastebin.com/JVL3MyYp

int main()

{
    float f;

    scanf("%f",&f);

    while( f!= (float)'q')
    {
        printf("f is %f\n",f);
        scanf("%f",&f);

    }

    return 0;
}