View Compilation Error

0_0_15323954_29753.cpp:15:6: error: expected constructor, destructor, or type conversion before '(' token
 scanf("%d",&t);
      ^
0_0_15323954_29753.cpp:16:1: error: expected unqualified-id before 'for'
 for (int cas = 1; cas <= t; cas++)
 ^
0_0_15323954_29753.cpp:16:19: error: 'cas' does not name a type
 for (int cas = 1; cas <= t; cas++)
                   ^
0_0_15323954_29753.cpp:16:29: error: 'cas' does not name a type
 for (int cas = 1; cas <= t; cas++)
                             ^
0_0_15323954_29753.cpp:40:1: error: expected unqualified-id before 'return'
 return 0;
 ^