C datatypes

Int and long int

#include <stdio.h>
//Author: heth@mercantec.dk

int main( void ) {
        int int_max,int_min;
        unsigned int uint_max;
        long int lint_max,lint_min;
        unsigned long int ulint_max;

        printf("Integer size = %i - long integer size = %i\n",
                 (int) sizeof(int_max), (int) sizeof(lint_max) );
        printf("================= integer ================\n");
        int_max = 0x7fffffff;
        int_min = 0x80000000;
        printf("int_max = %i og int_min = %i\n", int_max,int_min);
        int_max++;
        int_min--;
        printf("int_max = %i og int_min = %i\n", int_max,int_min);
        printf("=========== Unsigned integer =============\n");
        uint_max = 0xffffffff;
        printf("uint_max = %u\n" , uint_max);
        uint_max++;
        printf("uint_max = %u\n", uint_max);

        printf("==============Long integer ===============\n");
        lint_max = 0x7fffffffffffffff;
        lint_min = 0x8000000000000000;
        printf("lint_max = %li og lint_min = %li\n", lint_max,lint_min);
        lint_max++;
        lint_min--;
        printf("lint_max = %li og lint_min = %li\n", lint_max,lint_min);
        printf("=========== Unsigned integer =============\n");
        ulint_max = 0xffffffffffffffff;
        printf("ulint_max = %lu\n" , ulint_max);
        ulint_max++;
        printf("ulint_max = %lu\n", ulint_max);
}

Compiling and running

heth@mars:~/bin$ gcc -v
gcc version 4.4.5 (Ubuntu/Linaro 4.4.5-15ubuntu1)
heth@mars:~/bin$ uname -a
Linux mars 2.6.35-24-generic #42-Ubuntu SMP Thu Dec 2 02:41:37 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
heth@mars:~/bin$ gcc types.c -o types
heth@mars:~/bin$ ./types
Integer size = 4 - long integer size = 8
================= integer ================
int_max = 2147483647 og int_min = -2147483648
int_max = -2147483648 og int_min = 2147483647
=========== Unsigned integer =============
uint_max = 4294967295
uint_max = 0
==============Long integer ===============
lint_max = 9223372036854775807 og lint_min = -9223372036854775808
lint_max = -9223372036854775808 og lint_min = 9223372036854775807
=========== Unsigned integer =============
ulint_max = 18446744073709551615
ulint_max = 0
heth@mars:~/bin$