View Compilation Error

0_0_27465263_25744.cpp: In function 'int main()':
0_0_27465263_25744.cpp:4:26: error: 'scanf' was not declared in this scope
  while(scanf("%d%d",&n,&m)!=EOF&&n!=0||m!=0){
                          ^
0_0_27465263_25744.cpp:4:29: error: 'EOF' was not declared in this scope
  while(scanf("%d%d",&n,&m)!=EOF&&n!=0||m!=0){
                             ^
0_0_27465263_25744.cpp:9:22: error: 'printf' was not declared in this scope
      printf("%d",a[i]);
                      ^
0_0_27465263_25744.cpp:10:31: error: 'printf' was not declared in this scope
     }else printf("%d%d",m,a[i]);
                               ^
0_0_27465263_25744.cpp:12:15: error: 'printf' was not declared in this scope
    printf("\n");
               ^