View Compilation Error

0_0_2003363_4141.cpp:37: error: `main' must return `int'
0_0_2003363_4141.cpp: In function `int main(...)':
0_0_2003363_4141.cpp:47: error: expected unqualified-id before "int"
0_0_2003363_4141.cpp:47: error: expected `,' or `;' before "int"
0_0_2003363_4141.cpp:48: error: `b' undeclared (first use this function)
0_0_2003363_4141.cpp:48: error: (Each undeclared identifier is reported only once for each function it appears in.)