Question

I want to ask very simple thing about conversion between type.

int theinteger = 75;

NSLog(@"Before theinteger is: %@", theinteger);

NSString *string = [NSString stringWithFormat:@"%d", theinteger];

NSLog(@"After theinteger is: %@", string);

Output is like

Before theinteger: 75
After theinteger: 114503696

What does this mean? Why after conversion my data is changed to 114503696?

When I tried

int theinteger = -1;

It’s OK

Before theinteger: -1
After theinteger: -1

Am I missing something?

Answer 1

Without seeing any evidence of it, I assume theinteger is, in fact, of type NSInteger or int.

When using a specifier, try using %i:

NSInteger theinteger = 75;
NSLog(@"theinteger is: %i", theinteger);

Output

theinteger is: 75

Here’s a list of specifiers.