View Compilation Error

0_0_19104627_24406.cpp: In function 'int main()':
0_0_19104627_24406.cpp:4:15: error: 'scanf' was not declared in this scope
  scanf("%d",&m);
               ^
0_0_19104627_24406.cpp:7:27: error: 'printf' was not declared in this scope
   printf("Score is error!");
                           ^
0_0_19104627_24406.cpp:9:15: error: 'printf' was not declared in this scope
   printf("A\n");
               ^
0_0_19104627_24406.cpp:11:15: error: 'printf' was not declared in this scope
   printf("B\n");
               ^
0_0_19104627_24406.cpp:13:15: error: 'printf' was not declared in this scope
   printf("C\n");
               ^
0_0_19104627_24406.cpp:15:15: error: 'printf' was not declared in this scope
   printf("D\n");
               ^
0_0_19104627_24406.cpp:17:15: error: 'printf' was not declared in this scope
   printf("E\n");
               ^