C ++ string. replace () character replacement function usage

The C ++ replace () function returns the maximum number of elements that a string can put. (Unlike capacity)

Size _ type max _ size () const; basic_string <char >:: size_type cap, max; cap

= S. capacity (); max = s. max_size (); // max= 4294967294.

Basic_string: rfind. Returns the first string value. If no value is found

Then npos is returned.

Unlike find, rfind starts from npos by default. Others are the same.

Basic_string: replace to replace the element or substring in the original string. Returns the string after replacement.

 

# Include <iostream>
# Include <string>
Using namespace std;

Int main ()
{
String str1 ("String handling C ++ style .");
String str2 ("STL Power ");

Cout <"Initial strings: n ";
Cout <"str1:" <str1 <endl;
Cout <"str2:" <str2 <"nn ";

// Demonstrate replace
Cout <"Replace 8 characters in str1 with str2: n ";
Str1.replace (7, 8, str2 );
Cout <str1 <endl;

Return 0;
}

/*
Initial strings:
Str1: String handling C ++ style.
Str2: STL Power

Replace 8 characters in str1 with str2:
String STL Power C ++ style.

*/
   
Specify location

# Include <iostream>
Using std: cout;
Using std: endl;

# Include <string>
Using std: string;

Int main ()
{
String string1 ("abc edfgh ijk lmno pqr stu vw xyz ");
  
Cout <"Original string: n" <string1 <endl;

Int position = string1.find ("."); // find first period

While (position! = String: npos)
   {
String1.replace (position, 2, "12345; 123", 5, 2 );
Position = string1.find (".", position + 1 );
   }

Cout <string1 <endl;
               
Return 0;
}  

/*
Original string:
Abc edfgh ijk lmno pqr stu vw xyz

Abc edfgh ijk lmno pqr stu vw xyz

*/
Insert (), erase (), and replace ().

# Include <iostream>
# Include <string>
Using namespace std;
  
Int main ()
{
String str1 ("");
String str2 ("B ");
  
Cout <"Initial strings: n ";
Cout <"str1:" <str1 <endl;
Cout <"str2:" <str2 <"nn ";
  
Str1.insert (6, str2 );
Cout <str1 <"nn ";
  
Str1.erase (6, 9 );
Cout <str1 <"nn ";
  
Str1.replace (7, 8, str2 );
Cout <str1 <endl;
  
Return 0;
}