View Compilation Error

0_0_9996719_31915.cpp: In function `int main()':
0_0_9996719_31915.cpp:21: error: a function-definition is not allowed here before '{' token
0_0_9996719_31915.cpp:21: error: expected `,' or `;' before '{' token
0_0_9996719_31915.cpp:28: error: `cmp' undeclared (first use this function)
0_0_9996719_31915.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)