View Compilation Error

0_0_18697510_23179.cpp: In function 'int main()':
0_0_18697510_23179.cpp:4:21: error: 'scanf' was not declared in this scope
  while(scanf("%d",&t)!=EOF)
                     ^
0_0_18697510_23179.cpp:4:24: error: 'EOF' was not declared in this scope
  while(scanf("%d",&t)!=EOF)
                        ^
0_0_18697510_23179.cpp:6:28: error: 'printf' was not declared in this scope
  {printf("score is error\n");}
                            ^
0_0_18697510_23179.cpp:12:15: error: 'printf' was not declared in this scope
   printf("A\n");
               ^
0_0_18697510_23179.cpp:26:2: error: expected '}' at end of input
  }
  ^