Calling Functions using Objective-C and C++

Question

Alright, I'm trying to call a function in xcode but apparently it isn't working. I made an objective-c class, and typed in the following code into the implementation file:

#import "Person.h"

@implementation Person

void printthis()
{
    NSLog(@"Hi, I have been printed");
}

int main(int argc, const char * argv[])
{

    @autoreleasepool {

        printthis();

    }
    return 0;
}



@end

Apparently, it returns the following error in xcode:

    ld: 1 duplicate symbol for architecture x86_64
clang: error:
    linker command failed with exit code 1 (use -v to see invocation)

gerrytan · Accepted Answer · 2013-01-28 22:19:11Z

2

Did you already have a main function somewhere else (probably main.m ?). If so the linker got confused -- you are not supposed to have duplicates of main function

answered Jan 28, 2013 at 22:19

gerrytan

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1 Comment

user2019767 Over a year ago

Actually thanks, I had a main.m file with the main function as well.

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