View Compilation Error

0_0_15995069_7976.cpp: In function 'int main()':
0_0_15995069_7976.cpp:4:18: error: 'scanf' was not declared in this scope
     scanf("%d",&n);
                  ^
0_0_15995069_7976.cpp:24:34: error: 'printf' was not declared in this scope
         printf("%d %d %d\n",a,b,c);
                                  ^