#include <iostream>
#include <string>
using namespace std;
int num[3]{ 3, 5, 6, };
cout << num[3] << endl;
string y;
getline(cin, y);
return 0;
}
gives an output of -858993460
#include <iostream>
#include <string>
using namespace std;
int num[]{ 3, 5, 6, };
cout << num << endl;
string y;
getline(cin, y);
return 0;
}
gives an output of 004FFC48
But I would like to have my output be 356. Why am I receiving different outputs in the two code examples stated above?
read your code and answer me, does y have any relation with the num array?
Of course not, is just another variable.
Another error in int num[]{ 3, 5, 6, };
_________________________________^__
remove the , you are just saying that your array will have 4 elements and you are not saying wich number will be in the last space, so the compiler just puts garbage in there and then you print the num variable space since arrays are like pointers but no the same.
(suggestion, remove the comma and remember the computer makes the instructions in ascendent order from line 1 to N)
if your want to make the output 356 you need to convert the int datatype to char because string is a set of chars. So make your own stringify function
#include <iostream>
#include <string> // is ambiguous because iostream already have string
using namespace std;
// where is the main function?
int num[]{ 3, 5, 6, };
cout << num << endl;// this should be in a for statement at the end of the program because you output the proccesed values
string y; // container of chars
getline(cin, y); //why do you need this?
return 0;
}
Fixed:
#include <iostream>
using namespace std;
int main() {
//just for printing the numbers
int num[]{3, 5, 6};
for (int i = 0; i < 3; i++)
cout << num[i] << endl;
return 0;
}
First, as a basic recommendation, read about the topic of pointer arithmetics for educational reasons.
Now, let's give you some code you can work with.
A raw array is somewhat unwieldy to use. There are situations in which you want to do that, but not in this one. What you want to do here is to use STL containers, such as std::vector. This one behaves like an array but also knows it's size and does some other nice things for you. If you use C++11 or higher, you can initialize those with a list, just like you did with the array:
std::vector<int> numbers = { 3, 5, 6 };
The next thing, there is no native printing for arrays or similiar types. A good thing to do here would to write a function that does that:
void print(const vector<int>& vec)
for(size_t i = 0; i < vec.size(); i++)
{
cout << vec[i] << " ";
}
cout << endl;
}
As you see, this works pretty well because vector has the method size(). We don't have to use a 3 in our code (a "magic number") and we have written a piece that can be reused in the future (our function).
Not the actual answer to your question, but I thought that this is something that helps you in the future. In general, take a good look at the things that the STL provides, those are your basic tools.
