test sizeof

#include <stdio.h>
float mypower(int);

int main(void){
    char c;
    short s;
    int i;
    long l;
    unsigned u;
    float f;
    double d;
    long double ld;
    int a[20];
    int *ptr = a;

    printf("size of char is %d\t"
        "the kinds of char is %0.f\n"
        "size of short is %d\t"
        "the kinds of short is %0.f\n"
        "size of int is %d\t"
        "the kinds of int is %0.f\n"
        "size of long is %d\t"
        "the kinds of long is %0.f\n"
        "size of unsigned is %d\t"
        "the kinds of unsigned is %0.f\n"
        "size of float is %d\t"
        "the kinds of float is %0.f\n"
        "size of double is %d\t"
        "the kinds of double is %0.f\n"
        "size of long double is %d\t"
        "the kinds of long double is %0.f\n"
        "size of array is %d\t"
        "the kinds of array is %0.f\n"
        "size of pointer is %d\t"
        "the kinds of pointer is %0.f\n",
        sizeof(c), mypower(sizeof(c)),
        sizeof(s), mypower(sizeof(s)),
        sizeof(i), mypower(sizeof(i)),
        sizeof(l), mypower(sizeof(l)),
        sizeof(u), mypower(sizeof(u)),
        sizeof(f), mypower(sizeof(f)),
        sizeof(d), mypower(sizeof(d)),
        sizeof(ld), mypower(sizeof(ld)),
        sizeof(a), mypower(sizeof(a)),
        sizeof(ptr)),mypower(sizeof(ptr));

    return 0;

}

float mypower(int x){
    float base = 1.0;
    for (int i = 1; i <= (8 * x); i++)
    {
        base = 2 * base;
    }

    return base;
}