View Compilation Error

0_0_34035592_2042.cpp: In function 'revo merge(long long int, long long int)':
0_0_34035592_2042.cpp:96:18: error: invalid operands of types 'const char [3]' and 'long long int' to binary 'operator<<'
   cout<<xx<"--"<<yy<<endl;
                  ^