forked from aniani/vim
866f229591
These were missing from commit c2a967a.
closes: #16470
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
// C integer constants
|
|
|
|
// Source: https://en.cppreference.com/w/c/language/integer_constant
|
|
|
|
#include <inttypes.h>
|
|
#include <stdio.h>
|
|
|
|
int main(void)
|
|
{
|
|
printf("123 = %d\n", 123);
|
|
printf("0123 = %d\n", 0123);
|
|
printf("0x123 = %d\n", 0x123);
|
|
printf("12345678901234567890ull = %llu\n", 12345678901234567890ull);
|
|
// the type is a 64-bit type (unsigned long long or possibly unsigned long)
|
|
// even without a long suffix
|
|
printf("12345678901234567890u = %"PRIu64"\n", 12345678901234567890u );
|
|
|
|
// printf("%lld\n", -9223372036854775808); // Error:
|
|
// the value 9223372036854775808 cannot fit in signed long long, which
|
|
// is the biggest type allowed for unsuffixed decimal integer constant
|
|
|
|
printf("%llu\n", -9223372036854775808ull );
|
|
// unary minus applied to unsigned value subtracts it from 2^64,
|
|
// this gives unsigned 9223372036854775808
|
|
|
|
printf("%lld\n", -9223372036854775807ll - 1);
|
|
// correct way to form signed value -9223372036854775808
|
|
}
|
|
|
|
// The following variables are initialized to the same value:
|
|
|
|
int d = 42;
|
|
int o = 052;
|
|
int x = 0x2a;
|
|
int X = 0X2A;
|
|
int b = 0b101010; // C23
|
|
|
|
// The following variables are also initialized to the same value:
|
|
|
|
unsigned long long l1 = 18446744073709550592ull; // C99
|
|
unsigned long long l2 = 18'446'744'073'709'550'592llu; // C23
|
|
unsigned long long l3 = 1844'6744'0737'0955'0592uLL; // C23
|
|
unsigned long long l4 = 184467'440737'0'95505'92LLU; // C23
|
|
|