Myujth

#include <iostream>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdlib.h>
using namespace std;

class thing
public:
 vector<unsigned short> vec;
 thing(string);
;

int main()
 thing adam("12345");
 for(int i = adam.vec.size() - 1;i >= 0;i--)
 cout << adam.vec[i] << endl;
 


thing::thing(string str)
 for(int i = str.size() - 1; i >= 0;i--)
 cout << str[i] << endl;
 vec.push_back(str[i]);
 

I'm trying to make a constructor that takes in a string and fills the vector with the string in reverse, but instead of filling the vector with the values 5,4,3,2,1, it fills it with 53,52,51,59,49. This happens when I call push_back() and I'm confused on why.

I'm trying to make a constructor that takes in a string and fills the vector with the string in reverse

You probably don't really want to do that. As @JesperJuhl suggests - you can always just access the string in reverse. Why the needless copy?

instead of filling the vector with the values 5,4,3,2,1, it fills it with 53,52,51,59,49

You're mistaking the characters '5', '4', '3' with their integer values. The values of string elements are numbers, but those numbers are indices into some character set. Without going into too much detail about - here's the relevant fragment of the character set in your case:

Indeed, the character '5' has index 53 (decimal) within the character set, '4' has 52 and so on.

for(int i = adam.vec.size() - 1;i >= 0;i--)
 cout << adam.vec[i] << endl;

Your code to insert in reverse order is working just fine. But you are displaying the vector in reverse order also, so it goes back to previous order. To display in correct order, just use:

thing adam("12345");
for(size_t i = 0; i < adam.vec.size(); i++)
 cout << adam.vec[i] << ' ';
cout << endl;
//or 
for(const auto &element : adam.vec)
 cout << element << ' ';
cout << endl;

Your method for(int i = str.size() - 1; i >= 0;i--)... for iterating backward works in most cases, but casting size in to int can be a problem. The standard library offers other methods. Example:

thing::thing(string str) 

 std::copy(str.crbegin(), str.crend(), std::back_inserter(vec));

Or use iterators to traverse forward or backward.