How to Pass Strings to Functions?
In the same way that we pass an array to a function, strings in C++ can be passed to functions as character arrays. Here is an example program:
Example:
C++
// C++ Program to print string using function#include <iostream>using namespace std;void print_string(string s){ cout << "Passed String is: " << s << endl; return;}int main(){ string s = "w3wiki"; print_string(s); return 0;} |
Passed String is: w3wiki
Strings in C++
C++ strings are sequences of characters stored in a char array. Strings are used to store words and text. They are also used to store data, such as numbers and other types of information. Strings in C++ can be defined either using the std::string class or the C-style character arrays.
1. C Style Strings
These strings are stored as the plain old array of characters terminated by a null character ‘\0’. They are the type of strings that C++ inherited from C language.
Syntax:
char str[] = "w3wiki";
Example:
C++
// C++ Program to demonstrate strings#include <iostream>using namespace std;int main(){ char s[] = "w3wiki"; cout << s << endl; return 0;} |
w3wiki
2. std::string Class
These are the new types of strings that are introduced in C++ as std::string class defined inside <string> header file. This provides many advantages over conventional C-style strings such as dynamic size, member functions, etc.
Syntax:
std::string str("w3wiki");
Example:
C++
// C++ program to create std::string objects#include <iostream>using namespace std;int main(){ string str("w3wiki"); cout << str; return 0;} |
w3wiki
One more way we can make strings that have the same character repeating again and again.
Syntax:
std::string str(number,character);
Example:
C++
#include <iostream>using namespace std;int main(){ string str(5, 'g'); cout << str; return 0;} |
Output:
ggggg
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