int data type past 32767 in program no error received (program runs)

Hey all, i'm working on a programming question from a website. The question requires me to use a Fibonacci sequence whose values do not exceed four million. My question, to prepare me for the Fibonacci problem, data types:


int signed -32,76 - +32,767
unsigned long 0 - 4,294,967,295


I wrote a quick program, below, with values of int outside of the specified range (-32,767 - +32,767) for int and the program ran & successfully (4000000 was reached). Was wondering what if any error I can expect (any compiler errors initializing a variable that is out of data type size?)

Code:

---

#include <stdio.h>


int main (void)
{
        int limit = 4000000;
        int i = 3500000;




        while (i < limit)
        {
                i++;
                printf("%d\n", i);
        };


        return 0;
}

---

The range of [-32,767, +32,767] for an int is only the minimum range guaranteed by the standard. It would only usually be that limited on a 16-bit system. (And even there the lowest value would be -32,768 for a two's complement machine.)

Try running this on your system.

Code:

---

#include <stdio.h>
#include <limits.h>
 
int main() {
    printf("SHRT_MIN:    %20d\n",  SHRT_MIN);
    printf("SHRT_MAX:    %20d\n",  SHRT_MAX);
    printf("USHRT_MAX:  %20u\n",  USHRT_MAX);
    printf("INT_MIN:    %20d\n",  INT_MIN);
    printf("INT_MAX:    %20d\n",  INT_MAX);
    printf("UINT_MAX:    %20u\n",  UINT_MAX);
    printf("LONG_MIN:    %20ld\n",  LONG_MIN);
    printf("LONG_MAX:    %20ld\n",  LONG_MAX);
    printf("ULONG_MAX:  %20lu\n",  ULONG_MAX);
    printf("LLONG_MIN:  %20lld\n", LLONG_MIN);
    printf("LLONG_MAX:  %20lld\n", LLONG_MAX);
    printf("ULLONG_MAX:  %20llu\n", ULLONG_MAX);
    return 0;
}

---

I get:

Code:

---

SHRT_MIN:                  -32768
SHRT_MAX:                  32767
USHRT_MAX:                  65535
INT_MIN:              -2147483648
INT_MAX:              2147483647
UINT_MAX:              4294967295
LONG_MIN:    -9223372036854775808
LONG_MAX:    9223372036854775807
ULONG_MAX:  18446744073709551615
LLONG_MIN:  -9223372036854775808
LLONG_MAX:    9223372036854775807
ULLONG_MAX:  18446744073709551615

---