Solution for Exercise 18-1

ex1801

#include <stdio.h>

int main()
{
    char c = 'c';
    int i = 123;
    float f = 98.6;
    double d = 6.022E23;

    printf("char\t%u\n",sizeof(c));
    printf("int\t%u\n",sizeof(i));
    printf("float\t%u\n",sizeof(f));
    printf("double\t%u\n",sizeof(d));
    return(0);
}

Notes

* I didn't need to assing values to the variables in Lines 5 through 8; the sizeof operator works on variables whether they're initialized or not.

* The %u conversion character is required to report the unsigned int value returned by sizeof.

* Some compilers may let you use the %zd conversion character, which is designed to display size_t variables returned by sizeof.

* On the off-chance that you're using a Macintosh, or some other Unix variant, you'll need to change the conversion character used in printf() Lines 10 through 13 to %ld. On those systems, the sizeof operator returns a long int value.

Exercise ex1802 →