View Compilation Error

0_0_36414927_3429.cpp: In function 'int main()':
0_0_36414927_3429.cpp:5:37: error: 'scanf' was not declared in this scope
      while(scanf("%d/%d/%d",&y,&m,&d)!=EOF);
                                     ^
0_0_36414927_3429.cpp:5:40: error: 'EOF' was not declared in this scope
      while(scanf("%d/%d/%d",&y,&m,&d)!=EOF);
                                        ^
0_0_36414927_3429.cpp:7:27: error: lvalue required as left operand of assignment
          if(y%400==0||(y%4=0&&(y%100!=0)))
                           ^
0_0_36414927_3429.cpp:12:10: error: 'cout' was not declared in this scope
          cout<<sum<<endl;
          ^
0_0_36414927_3429.cpp:12:21: error: 'endl' was not declared in this scope
          cout<<sum<<endl;
                     ^