Typesize.txt

This pages records the results obtained by compiling and running typesize.c on various platforms. If you have access to an OS/Platform not listed, feel free to add additional results.

                short   int     long    long^2  float   double  long double
Minix/i286      2       2       4       N/A     4       8       8
Minix/i486      2       4       4       N/A     4       8       8
FreeBSD/i686    2       4       4       8       4       8       12
OpenBSD/amd64   2       4       8       8       4       8       16
NetBSD/sparc32  2       4       4       8       4       8       8
OpenBSD/sparc64 2       4       8       8       4       8       16
NetBSD/alpha    2       4       8       8       4       8       8
HP-UX/hppa      2       4       4       8       4       8       8
AIX/power/32bit 2       4       4       8       4       8       8
AIX/power/64bit 2       4       8       8       4       8       8
IRIX/mips       2       4       4       8       4       8       16

typesize.c

#include <stdio.h>

int main(void)
{
        char ca;
        short int ia;
        int ib;
        long int ic;
        long long int id;
        float fa;
        double da;
        long double db;


        printf("sizeof(char): %d\n", sizeof(ca));
        printf("sizeof(short int): %d\nsizeof(int): %d\nsizeof(long int): %d\nsizeof(long long int): %d\n",sizeof(ia), sizeof(ib), sizeof(ic), sizeof(id));
        printf("sizeof(float): %d\n", sizeof(fa));
        printf("sizeof(double): %d\nsizeof(long double): %d\n", sizeof(da), sizeof(db));

        return 0;
}