Returning a string

I have just started with Objective-C and have a (开发者_JAVA技巧probably) very, very basic question/problem.

int testf(int x){
    NSDateFormatter *dateformatter=[[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd.MM.yyyy"];
    NSString *infstr=[dateFormatter stringFromDate:[[NSDate] dateByAddingTimeInterval:(60*x)];
    return infstr;
}
NSString *testString=testf(1);

I currently have the following problem: I don't know how to return a string from a function. I couldn't even figure it out through Google.

The aforementioned Code leads to a warning "Pointer from integer without a cast". I hope anyone does know a solution to this "problem" and is willing to share it with me.

Thanks in advance.

You need to create an NSString object using the int.

NSString *testf(int x) {
    return [NSString stringWithFormat:@"%i",x];
}

NSString *testString = testf(1);

Just change your return type from int to an NSString pointer like so:

NSString* testf(int x){
    NSDateFormatter *dateformatter=[[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd.MM.yyyy"];
    NSString *infstr=[dateFormatter stringFromDate:[NSDate dateByAddingTimeInterval:(60*x)]];
    [dateFormatter release];
    return infstr;
}
NSString *testString=testf(1);

Also your dateFormatter is leaking, so add the release statement as shown above.