View Compilation Error

0_0_2677289_2989.cpp: In function `int main()':
0_0_2677289_2989.cpp:22: error: `key3' undeclared (first use this function)
0_0_2677289_2989.cpp:22: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2677289_2989.cpp:22: error: `key1' undeclared (first use this function)
0_0_2677289_2989.cpp:22: error: `key2' undeclared (first use this function)
0_0_2677289_2989.cpp:30: error: expected `;' before '}' token