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  1. extern int a, b, c;
  2.  
  3. int main()
  4. {
  5.   return a + b + c;
  6. }
Compilation error #stdin compilation error #stdout 0s 4392KB
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stdin
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Standard input is empty
compilation info 
/home/CPCz1j/ccrst43X.o: In function `main':
prog.cpp:(.text.startup+0x2): undefined reference to `b'
prog.cpp:(.text.startup+0x8): undefined reference to `a'
prog.cpp:(.text.startup+0xe): undefined reference to `c'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/rgf40P
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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