(Erasing Characters from a string) Write a program that erases the sequences "by" and "BY" from a string.

Question

What will be an ideal response?

Answer 1

```
// Program erases "by" or "BY" from strings.
#include
#include
using namespace std;

void deleteBy( string&, string ); // prototype

int main()
{
string s;

cout << "Enter a word: ";
cin >> s;

deleteBy( s, "by" ); // call function deleteBy to get rid of
deleteBy( s, "BY" ); // any occurrences of "by" and "BY"

cout << s << endl;
} // end main

// function to look for and get rid of "by" and "BY"
void deleteBy( string& sRef, string z )
{
int x = sRef.find( z ); // use member function find of class string

// until the end of the string is reached
while ( x <= sRef.length() )
{
sRef.erase( x, 2 ); // erase the occurrence of "by" or "BY"
x = sRef.find( z ); // find location of occurrence
} // end while
} // end function deleteBy
```
Enter a word: firstBYsecondby
firstsecond