Thread: Problem in printing float

Hi,
I am a beginner in C programming, and when trying to see how the type "float" works, I typed in

Code:

#include <stdio.h>



int main(int argc, const char * argv[]) {
// insert code here...
    int a;
    float b;

    a = getchar();
    b = a/100;

    printf("%1.3f\n",b);

}

but the results, whatever it should be, would only give me 0.000

And I get weird numbers too here,

Code:

int main(int argc, constchar * argv[]) {// insert code here...
    float b;
    b = getchar();
    printf("%1.3f\n",b);
}

It would be great if you could teach me why it gives me these totally wrong answers and how to fix it.

Thanks a lot!

I don't know what floats you are expecting to get from getchar(). In general that method is very inadequate. You should be at least asking for a string that you convert to a floating point number. You could also use scanf() I suppose.

Consider this:

Code:

#include <stdio.h>
int main(int argc, char **argv) {
   double b;
   if (scanf("%f", &b) == 1) {
      printf("%1.3f\n", b);
   }
   return 0;
}

You can try that example with double and float and change the precision in the print statement to see how it affects the displayed value.