foo.cpp: In function 'int main()':
foo.cpp:50:1: error: expected primary-expression before '?' token
 ? 
 ^
foo.cpp:50:1: error: expected primary-expression at end of input
foo.cpp:50:1: error: expected ':' at end of input
foo.cpp:50:1: error: expected primary-expression at end of input
foo.cpp:50:1: error: expected ';' at end of input
foo.cpp:50:1: error: expected '}' at end of input