View Compilation Error

0_0_18023145_26114.cpp:38:4: error: stray '\' in program
    cout<<sum\num<<endl;
    ^
0_0_18023145_26114.cpp: In function 'int main()':
0_0_18023145_26114.cpp:38:14: error: expected ';' before 'num'
    cout<<sum\num<<endl;
              ^