diff options
Diffstat (limited to 'c.html.markdown')
| -rw-r--r-- | c.html.markdown | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/c.html.markdown b/c.html.markdown index 7670824a..d3f20eda 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -85,7 +85,7 @@ int main() { // doubles are usually 64-bit floating-point numbers double x_double = 0.0; // real numbers without any suffix are doubles - // integer types may be unsigned (only positive) + // integer types may be unsigned (greater than or equal to zero) unsigned short ux_short; unsigned int ux_int; unsigned long long ux_long_long; @@ -234,7 +234,7 @@ int main() { // same with j-- and --j // Bitwise operators! - ~0x0F; // => 0xF0 (bitwise negation, "1's complement") + ~0x0F; // => 0xFFFFFFF0 (bitwise negation, "1's complement", example result for 32-bit int) 0x0F & 0xF0; // => 0x00 (bitwise AND) 0x0F | 0xF0; // => 0xFF (bitwise OR) 0x04 ^ 0x0F; // => 0x0B (bitwise XOR) @@ -242,7 +242,7 @@ int main() { 0x02 >> 1; // => 0x01 (bitwise right shift (by 1)) // Be careful when shifting signed integers - the following are undefined: - // - shifting into the sign bit of a signed integer (int a = 1 << 32) + // - shifting into the sign bit of a signed integer (int a = 1 << 31) // - left-shifting a negative number (int a = -1 << 2) // - shifting by an offset which is >= the width of the type of the LHS: // int a = 1 << 32; // UB if int is 32 bits wide |