Why does a float always end as .0000.. after dividing?

Question

#include<stdio.h>
void main(){
  int a;float b;
  scanf("%d",&a);
  b=a/4;
  printf("%f",b);
}

For example, 9 divided by 4 should print 2.25 but instead it prints 2.0000. Why?

Integer division. `b=a/4.0;` – Elliott Frisch Jun 05 '15 at 02:50 — Elliott Frisch, Jun 05 '15 at 02:50

score 2 · Answer 1 · edited Jun 05 '15 at 03:57

2

Because a is an int. You should cast a to a float, like this

b = (float)a /4;

edited Jun 05 '15 at 03:57

Spikatrix

answered Jun 05 '15 at 02:55

Liyuan Liu

Some example with explanation would be great. – Nilambar Sharma Jun 05 '15 at 02:57

score 1 · Answer 2 · answered Jun 05 '15 at 02:51

1

a is an integer, so your division is performed with integers throughout then the result is coerced to a float when you assign it to b

answered Jun 05 '15 at 02:51

2 Answers2