Created
May 25, 2012 21:17
-
-
Save jacksonfdam/2790642 to your computer and use it in GitHub Desktop.
Convert Signed Or Unsigned Integers To Binary In NSString
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
- (NSString *)intToBinary:(int)number | |
{ | |
// Number of bits | |
int bits = sizeof(number) * 8; | |
// Create mutable string to hold binary result | |
NSMutableString *binaryStr = [NSMutableString string]; | |
// For each bit, determine if 1 or 0 | |
// Bitwise shift right to process next number | |
for (; bits > 0; bits--, number >>= 1) | |
{ | |
// Use bitwise AND with 1 to get rightmost bit | |
// Insert 0 or 1 at front of the string | |
[binaryStr insertString:((number & 1) ? @"1" : @"0") atIndex:0]; | |
} | |
return (NSString *)binaryStr; | |
} | |
Here is a range of examples: | |
NSLog(@"Int: %d", 0); | |
NSLog(@"Binary: %@", [self intToBinary:0]); | |
NSLog(@"Int: %d", 123); | |
NSLog(@"Binary: %@", [self intToBinary:123]); | |
NSLog(@"Int: %d", -123); | |
NSLog(@"Binary: %@", [self intToBinary:-123]); | |
NSLog(@"Int: %d", 999999); | |
NSLog(@"Binary: %@", [self intToBinary:999999]); | |
NSLog(@"Int: %d", -999999); | |
NSLog(@"Binary: %@", [self intToBinary:-999999]); | |
NSLog(@"Int: %d", 2147483647); | |
NSLog(@"Binary: %@", [self intToBinary:2147483647]); | |
And the corresponding output: | |
Int: 0 | |
Binary: 00000000000000000000000000000000 | |
Int: 123 | |
Binary: 00000000000000000000000001111011 | |
Int: -123 | |
Binary: 11111111111111111111111110000101 | |
Int: 999999 | |
Binary: 00000000000011110100001000111111 | |
Int: -999999 | |
Binary: 11111111111100001011110111000001 | |
Int: 2147483647 | |
Binary: 01111111111111111111111111111111 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment