Common uses of the C + + string Append method

The

Append function is to append a character or string to the back of a string.
1). Add c-string
String s = "Hello" to the back of the string; const char *c = "Out Here";
S.append (c);//Concatenate C-type string s to the end of the current string
s = "Hello out here";
2). Add a portion of c-string to the back of the string
string s= "Hello"; const char *c = "Out Here";
S.append (c,3);//The first n characters of type C string s connect prompt to the end of the current string
s = "Hello out";
3). Add string
String s1 = "Hello" to the back of string; String s2 = "Wide"; string s3 = "World";
S1.append (S2); S1 + = s3;//Connect the string s to the end of the current string
S1 = "Hello wide"; S1 = "Hello Wide World";
4). Add a string to the back of the string
string s1 = "Hello", s2 = "Wide World";
S1.append (S2, 5, 5);////5 characters from 5 in the string S2 connect prompt to the end of the current string
S1 = "Hello World";
String str1 = "Hello", str2 = "Wide World";
Str1.append (Str2.begin () +5, Str2.end ()), and//connects the portion between the S2 iterator begin () +5 and End () to the end of the current string
str1 = "Hello World";
5). Add more characters to the string after
string s1 = "Hello";
S1.append (4, '! ');//Add 4 characters at the end of the current string!
S1 = "Hello!!!!";

C + + string append () Add text

Use append () to add text to common methods:

Add another complete string directly:

such as Str1.append (STR2);

Add a substring of another string:

such as Str1.append (STR2, 11, 7);

Add several of the same characters:

such as Str1.append (5, '. ');

Note that the number in the previous character is behind. The above code means to add 5 "." After str1.

Example:

     //========================================  #include<iostream>using namespacestd; //========================================            intMain () {stringstr1="I like C + +"; stringStr2=", I like the world."; stringstr3="Hello"; stringSTR4 ("Hi"); //====================================  str1.append (STR2); Str3.append (STR2, One,7); Str4.append (5,'.'); //====================================  cout<<str1<<Endl; cout<<str3<<Endl; cout<<str4<<Endl; System ("Pause"); return 0; }            //========================================  

Run the result as

I like C++,i.

Hello World.

Hi.....

Common uses of the C + + string Append method