Vector Lists

Question

HY ALL, I JUST COMPILED THIS CODE BUT IT WONT GIVE ME THE EXPECTED OUTPUT.
Please help to debug.

#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main()
{
vector<string> stringList;
vector<string>::iterator stringListIterator;

for(stringListIterator = stringList.begin(); stringListIterator != stringList.end(); ++stringListIterator)
{
cout << "Enter a string" ;
string stringName;
cin >> stringName;
stringList.push_back(stringName);

if(stringList.size() == 10)
{
break;
}

}
for(stringListIterator = stringList.begin(); stringListIterator != stringList.end(); ++stringListIterator)
{
cout << *stringListIterator;
cout << endl;
}
return 0;
}

Answer 1

Yes the vector size is '0' == empty, so there's nothing to iterate over in the input section.

unsigned int mynum = 12; // or put 12 or what ever you like in the for loop, up to you.

for(unsigned int x = 0; x < mynum; x++) // use this.
{
cout << "Enter a string" ;
string stringName;
cin >> stringName;
stringList.push_back(stringName);

if(stringList.size() == 10)
{
break;
}
}

Answer 2

Your stringList is empty, there's nothing to iterate over.

Answer 3

I assumed that the vector was initialized to vector.size = 0 at declaration, and returns a pointer to the base address.
The first for loop is my attempt at initializing the vector values to 10 using the if statement in the loop.

Answer 4

https://code.sololearn.com/ck3PJ8lO0ujb/?ref=app

This displays the size of the vector after declaration, all other statements are put within comments.

Answer 5

Hy, I managed to revise my code.

initial Code
for(stringListIterator = stringList.begin(); stringListIterator = stringList.end(); ++stringListIterator)
//stringListIterator = stringList.begin() == stringListIterator != stringList.end(), therefore doesn't enter the for-block

New Code using while loop
https://code.sololearn.com/cvvN1YSnsDMO

Answer 6

ah but what is someone enters something other than Y/y/N/n?

Answer 7

In that case an assert macro should do the trick

Answer 8

Although I class myself as a beginner...I am aware that a assert macros are used for debugging and are normally disabled/'switch off' in the production/final version of progs.