View Compilation Error

0_0_37592558_10.cpp: In function 'int read()':
0_0_37592558_10.cpp:10:9: error: 'h' was not declared in this scope
  cin >> h >> m >> s;    
         ^
0_0_37592558_10.cpp:10:14: error: 'm' was not declared in this scope
  cin >> h >> m >> s;    
              ^
0_0_37592558_10.cpp:10:19: error: 's' was not declared in this scope
  cin >> h >> m >> s;    
                   ^