Short Pregramming Problems (8 points) (4 poins) Write an iterative (loop) functi

Question

Short Pregramming Problems (8 points) (4 poins) Write an iterative (loop) function that reverses a vector of elements in type string, by swapping corresponding elements in the vector. Youcannot ase oxdditiomal vectors in your solwtion or call a fionction of vector to directly reverse t 1. void ReverseString Vectorf 2. (4 point) Define a function CoordUpdate0 that transforms its first two input parameters xlon and yin into two output parameters xOut and yOut. The function returns void. The update is defined as new(20.old +3). Ex: Ifx1n-3and yin = 4, then xOut is 63 and yout is 83. See example call to CoordUpdate) below in function maino. Winclude ciostream using namespace std; int maino ( int xValNew-0 int yValNew = 0; CoordUpdate(3, 4, xValNew, yValNew) cout

Explanation / Answer

1. CoordUpdate function:

-----------------------------------------------------

//function to update coordinates. Output parameters to be passed by reference
void CoordUpdate(int xln,int yln,int &xOut,int &yOut)
{
   xOut=20*xln+3;
   yOut=20*yln+3;
}

--------------------------------------------

2. ReverseStringVector function:

--------------------------------------------------

//function to reverse a string vector
void ReverseStringVector(vector<string>& v)
{
   int length=v.size();
   string temp;
   for(int i=0,j=length;i<length/2;i++,j--)
   {
       if(j>0)
       {
       temp=v.at(i);
       v.at(i)=v.at(j-1);
       v.at(j-1)=temp;
       }
   }
}

-------------------------------------------------------------

3. SwapStrings function:

------------------------------------------------------------

//function to swap two string
void SwapStrings(string &left, string& right)
{
   string temp;
   temp=left;
   left=right;
   right=temp;
}

-----------------------------------------------

4. maximum value in a vector:

----------------------------------------------

    int maxVal=v.at(0);
   for(int i=0;i<v.size();i++)
   {
       if(v.at(i) > maxVal)
       {
           maxVal=v.at(i);
       }
   }

   cout<<"Max value is:"<<maxVal<<endl;

--------------------------------------

5. Multiple choice questions

   1) D

   2) B

   3) C

   4) D

   5) C

6. main function:

--------------------------------------------

//main function
int main() {
   int xValNew=0;
   int yValNew=0;

   CoordUpdate(3,4,xValNew,yValNew);
   cout << "(3,4) becomes " << "(" << xValNew << "," << yValNew << ")" << endl;

   std::vector<string> v;
   std::vector<string>::iterator it;
   it=v.begin();
   it=v.insert(it,"string1");
   it=v.begin();
   v.insert(it,1,"string2");
   it=v.begin();
   v.insert(it,1,"string3");
   it=v.begin();
   v.insert(it,1,"string4");
   it=v.begin();
   v.insert(it,1,"string5");

   cout<<"Before reversing..."<<endl;
   for(int i=0;i<v.size();i++)
       cout<<v.at(i)<<endl;
   ReverseStringVector(v);
   cout<<"After reversing..."<<endl;
   for(int i=0;i<v.size();i++)
       cout<<v.at(i)<<endl;

   string left="Fresno";
   string right="Merced";
   SwapStrings(left,right);
   cout<<left<<" "<<right<<endl;
   return 0;
}

---------------------------------------------

7. Output:

-----------------------------------------------

(3,4) becomes (63,83)
Before reversing...
string5
string4
string3
string2
string1
After reversing...
string1
string2
string3
string4
string5
Merced Fresno

-------------------------------------------

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