foo.cc: In function 'int main()':
foo.cc:21:32: warning: for increment expression has no effect [-Wunused-value]
   for (int i = 0; i < number; i+2)
                               ~^~
/tmp/ccL2rjlZ.o: In function `_GLOBAL__sub_I_a':
foo.cc:(.text.startup+0x133): relocation truncated to fit: R_X86_64_PC32 against `.bss'
foo.cc:(.text.startup+0x151): relocation truncated to fit: R_X86_64_PC32 against `.bss'
collect2: error: ld returned 1 exit status

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