0_0_3195455_20482.cpp: In function `int main()':
0_0_3195455_20482.cpp:11: error: `plus' undeclared (first use this function)
0_0_3195455_20482.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3195455_20482.cpp: At global scope:
0_0_3195455_20482.cpp:14: error: expected constructor, destructor, or type conversion before '(' token
0_0_3195455_20482.cpp:14: error: expected `,' or `;' before '(' token
0_0_3195455_20482.cpp:17: error: expected unqualified-id before '{' token
0_0_3195455_20482.cpp:17: error: expected `,' or `;' before '{' token
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