View Compilation Error

0_0_24464738_10593.cpp: In function 'int main()':
0_0_24464738_10593.cpp:5:12: error: 'getchar' was not declared in this scope
  a=getchar();b=getchar();c=getchar();
            ^
0_0_24464738_10593.cpp:15:25: error: 'printf' was not declared in this scope
  printf("%c %c %c",a,b,c);
                         ^