Floats being Inexact

Question

I am puzzled. I have no explanation to why this test passes when using the double data type but fails when using the float data type. Consider the foll

Answer 1

Try this:

#include 

int main(){
    float total = 0.00;
    int i;
    for (i = 0; i < 100; i++)
        total += 0.01;

    printf("%f\n", total);

    if (total == 1.0)
        puts("Precise");
    else
        puts("Rounded");
}

At least on most machines, you'll get an output of "Rounded". In other words, the result simply happens to be close enough that when it's printed out, it's rounded so it looks like exactly 1.00, but it really isn't. Change total to a double, and you'll still get the same.