program C++ penerapan perintah printf dan scanf

#include 
#include 
#include 
int main(void)
{
int var1;
float var2;
char tombol,
char str1[30];
clrscr();
printf("Input keyboard dengan printf\n");
printf("Ketikan nilai var1 = "); scanf("%d", &var1);
printf("Ketikan nilai var2 = "); scanf("%f", &var2);
printf("Ketikan nilai str1 = "); scanf("%s", &str1);
printf("Tekanlah sebuah tombol ...\n\n");
tombol = getch();
printf("Nilai var1 = %d\n", var1);
printf("Nilai var2 = %f\n", var2);
printf("Nilai str1 = %s\n", str1);
printf("Tombol yang kamu tekan %c\n\n", tombol);
cout << "Input dengan cin\n";
cout << "Ketikan nilai var1 = "; cin >> var1;
cout << "Ketikan nilai var2 = "; cin >> var2;
cout << "Ketikan nilai str1 = "; cin >> str1;
cout << "\n\nNilai var1 = " << var1;
cout << "\nNilai var2 = " << var2;
cout << "\nNilai str1 = " << str1 << endl;
getch();
return 0;
}