Question

Write a C++ program. Please use Codeblocks, show output. And provide all three files as asked and instructions on the combination and anything else.

The menu must ask how many names they wish to enter. Max is up to 20. And the end of each prompt please ask “Do you want to continue or Quit” so after each execution of the program it doesn’t automatically quit but gives the option to either repeat or quit through selection.

Answer 1

#include<iostream>
#include<fstream>
using namespace std;
int main()
{
int size;
char first[20][20],last[20][20];
while(1)
{
cout<<"How many names you wish to enter:";
cin>>size;
if( size<=0 || size>20 )
{
cout<<"error size should be 1 to 20"<<endl<<"re-enter"<<endl;
continue;
}
int i=0;
cout<<"First names:"<<endl;
while(i<size)
cin>>first[i++];
i=0;
cout<<endl<<"Last names:"<<endl;
while(i<size)
cin>>last[i++];
ofstream out1,out2,out3;
out1.open("First.dat");
out2.open("Last.dat");
i=0;
while(i<size)
{
out1<<first[i]<<endl;
out2<<last[i]<<endl;
i++;
}
out1.close();
out2.close();
ifstream in1,in2,in3;
in1.open("First.dat");
in2.open("Last.dat");
out3.open("Full.dat");
i=0;
char arr[20];
while(i<size)
{
in1>>arr;
out3<<arr<<" ";
in2>>arr;
out3<<arr<<endl;
i++;
}
in1.close();
in2.close();
out3.close();
in3.open("Full.dat");
i=0;
cout<<endl<<"The combined names are:"<<endl;
while(i<size)
{
in3>>arr;
cout<<arr<<" ";
in3>>arr;
cout<<arr<<endl;
i++;
}
in3.close();
cout<<endl<<"Enter 1 to continue:";
int num;
cin>>num;
if(num!=1)
return 0;
}
return 0;
}

sample input-output