Assignment Error

Question

Just starting working with Cpp this month. In the middle of working on a hailstone assignment. Earlier I had no problem with the main function when it was just: int main(). I remember needing to review assignment requirements again, and noticed the professor wants us to use: int main (int argc, char** argv) instead of what I provided earlier. Once I made that change It get errors about cin, cout, and endl haven't been declared in this scope.

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#include <cstdio>
using namespace std;

//Function Variable Declaration.
int hailstone_Sequence(int n);
int lengthof_Sequence(int l);
//void Print_Set(int [] set, int size);

int main(int argc, char** argv)
{
int user_Input;
cin >> user_Input; (error)

cout << "What number shall I start with? " << user_Input << endl; (error)

cout << "The hailstone of sequence starting at " << user_Input << " is: " << hailstone_Sequence(user_Input) << endl;

cout << "The length of the sequence is ___. \n";

//cout << "The largest number in the sequence is: " << \n";

cout << "The longest hailstone sequence with a number up to __ has length ___ ";

cout << "The longest hailstone sequence with a number up to __ begins with ___ ";
return 0;
}

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Can someone provide some insight? Appreciate the help.

Answer 1

Whenever you use cout for example if you want to print hello somewhere, instead of 'using namespace std' which you would write at the top, after #include stuff, you just write:
std::cout<<"Hello";

Answer 2

Have in mind that you must write std:: for every cin or cout

Answer 3

Or just use those objects like this:
std::cout
std::cin

Answer 4

maybe you forgot to include iostream ?

Answer 5

Gotcha. I'll try to do that. I originally had iostream in, but he wanted us to use a template to start off that didn't have that. Could be a oversight on the professor's part, not sure. But I'll give it a shot. Thank you.

Answer 6

Filip

Where would I place those two? Before main or inside?

v/r

Sherwin Slaughter

Answer 7

Filip

Gotcha.

v/r

Sherwin Slaughter

Answer 8

Filip

Understood. Thank you for the help.

v/r

Sherwin Slaughter