#include <math.h>
#include <stdio.h>


int main(void) {
    float float_pi = acosf(-1.0f);
    double double_pi = acos(-1.0);
    long double long_double_pi = acosl(-1.0l);
    printf("float        size: (%2zu) %.100g\n", sizeof(float), float_pi);
    printf("double       size: (%2zu) %.100g\n", sizeof(double), double_pi);
    printf("long double  size: (%2zu) %.100Lg\n", sizeof(long double), long_double_pi);
    return 0;
}