I have the following code in C
#include <stdio.h>
int main()
{
float a = 1.88;
a =a - (0.25 * 7 + 0.1 * 1);
a = a *100;
printf("a = %f\n",a );
int b =(int) (a);
printf("b = %d\n", b);
}
The value of b should be 2 but I get the following output-
a = 3.000000
b = 2
Why is it so?
If you change
printf("a = %f\n",a );
to
printf("a = %.20f\n",a );
it outputs
a = 2.99999952316284179688
As you can see this is not 3.
So the conversion truncates it to 2.
When a float is converted to int only the integer part is stored i.e 2.9 only 2 is stored and remaining is truncated. Similar one in the case of division
#include<stdio.h>
main()
{
int a=12/5;
printf("%d\n",a);
}
Here the result is 2.4 but .4 is truncated ..
