Question

I am trying to return a string from certain position of the sentence on C++, like a function/ statement that is equivalent to excel mid function.

Answer 1

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

int main()
{
   string str ;
   cout<<"Enter sentence"<<endl;
   getline (cin, str);//to read a line with spaces

   int pos;
   cout<<"Enter position from where you want to get the string"<<endl;
   cin>>pos;
   int len=str.size();
   if(len<pos||pos<=0)
   {
       cout<<"Invalid position"<<endl;
       exit(0);
   }
int i=pos-1;
cout<<"String from position "<<pos<<" is => ";
if(str[i]==' '||str[i]=='   ')
{
   i++;
}
//break when you find terminating, space, tab or new line character
   while(str[i]!='\n'&&str[i]!=' '&&str[i]!='   '&&str[i]!='\0')
{
cout<<str[i];
i++;
}
cout<<endl;
cout<<"Sentence from position "<<pos<< " is => ";
cout<<str.substr(pos-1,len-1);
cout<<endl;
   return 0;
}

output 1-

Enter sentence
Hello Frank! What's going on?
Enter position from where you want to get the string
6
String from position 6 is => Frank!
Sentence from position 6 is => Frank! What's going on?

output 2-

Enter sentence
Hello Frank! What's going on?
Enter position from where you want to get the string
7
String from position 7 is => Frank!
Sentence from position 7 is => Frank! What's going on?