201084_0_16439.cpp:3: error: `main' must return `int'
201084_0_16439.cpp: In function `int main(...)':
201084_0_16439.cpp:9: error: `a' undeclared (first use this function)
201084_0_16439.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
201084_0_16439.cpp:9: error: `b' undeclared (first use this function)
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