I am using Xcode to write c++ code and the console on a mac to compile my progra

Question

I am using Xcode to write c++ code and the console on a mac to compile my program. I get the following error: uplicate symbol __Z14output_lettersRNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEEPi in: /var/folders/8_/_0d4zk7j0h7c95hf9hxvpq2c0000gn/T/characterCount-39fbd7.o /var/folders/8_/_0d4zk7j0h7c95hf9hxvpq2c0000gn/T/characterMain-a3fe63.o duplicate symbol __Z13count_lettersRNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEEPi in: /var/folders/8_/_0d4zk7j0h7c95hf9hxvpq2c0000gn/T/characterCount-39fbd7.o /var/folders/8_/_0d4zk7j0h7c95hf9hxvpq2c0000gn/T/characterMain-a3fe63.o ld: 2 duplicate symbols for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation

How can I fix the error? Thank you.

Explanation / Answer

You can try below things:-

1) Project Target > Build Setting > No Common Blocks, and change it to NO.

2) Go to Build Phases > Search for the file name > Delete duplicate , Then error should be removed

Try these and let me know if if you any such issue. I will help

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