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C++ String assign() function

C++ String assign() function tutorial for beginners and professionals with examples on constructor, if-else, switch, break, continue, comments, arrays, object and class, exception, static, structs, inheritance, aggregation etc.

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C++ String Assign()

This functions assigns a new value to the string,replacing all its current contents.

Syntax

Consider two strings str1 and str2, Syntax would be :

Str1.assign(str2);

Parameters

str : str is a string object, whose value to be assigned.

subpos : It defines the position of the character which is to be copied as a substring.

sublen : It determines the number of characters of string to be copied in another string object.

n : Number of characters to copy.

ch : Character value to be copied n times

Return value

*this

Example 1

Let's see simple example.

#include<iostream>
using namespace std;
int main()
{
string str = "TheDeveloperBlog";
string str1;
str1.assign(str);
cout<<"Assigned string is : " <<str1;
return 0;
}

Output:

Assigned string is :TheDeveloperBlog

Example 2

Let's see simple example when position and length are mentioned in the parameters.

#include<iostream>
using namespace std;
int main()
{
string str = "C is a programming language";
string str1;
str1.assign(str,7,20) ;
cout<<str1;
return 0;
}

Output:

programming language

Example 3

Let's see simple example when n is given.

#include<iostream>
using namespace std;
int main()
{
string s;
s.assign("TheDeveloperBlog tutorial",10);
cout<<"Assigned string is :" <<s;
return 0; 
}

Output:

Assigned string is : TheDeveloperBlog

Example 4

Let's see simple example when character value is given in a parameter.

#include<iostream>
using namespace std;
int main()
{
string s;
s.assign(10.'a');
cout<<s;
return 0; 
}

Output:

aaaaaaaaaa

Next TopicC++ Strings




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