View Compilation Error

0_0_6784957_10282.cpp:3: error: `main' must return `int'
0_0_6784957_10282.cpp: In function `int main(...)':
0_0_6784957_10282.cpp:20: error: a function-definition is not allowed here before '{' token
0_0_6784957_10282.cpp:20: error: expected `,' or `;' before '{' token
0_0_6784957_10282.cpp:40: error: expected `}' at end of input