View Compilation Error

0_0_13637581_6278.cpp: In function 'int main()':
0_0_13637581_6278.cpp:26:1: error: 'scanf' was not declared in this scope
 );
 ^
0_0_13637581_6278.cpp:29:2: error: 'getchar' was not declared in this scope
 ();
  ^
0_0_13637581_6278.cpp:131:2: error: 'printf' was not declared in this scope
 ]);
  ^
0_0_13637581_6278.cpp:140:2: error: 'printf' was not declared in this scope
 ]); 
  ^