View Compilation Error

0_0_34789640_1787.cpp: In function 'int main()':
0_0_34789640_1787.cpp:38:5: error: expected initializer before 'num'
     num();
     ^
0_0_34789640_1787.cpp:44:13: error: 'sum' was not declared in this scope
             sum = 0;
             ^