/tmp/ccsgpkMg.o: In function `power(int, int, int)':
foo.cc:(.text+0x55): undefined reference to `power(int, int)'
foo.cc:(.text+0x6c): undefined reference to `power(int, int)'
foo.cc:(.text+0x98): undefined reference to `power(int, int)'
/tmp/ccsgpkMg.o: In function `main':
foo.cc:(.text.startup+0xc0): undefined reference to `power(int, int)'
collect2: error: ld returned 1 exit status

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