strrchr() function in C/C++
The strrchr() function in C/C++ locates the last occurrence of a character in a string. It returns a pointer to the last occurrence in the string. The terminating null character is considered part of the C string. Therefore, it can also be located to retrieve a pointer to the end of a string. It is defined in cstring header file.
Syntax :
const char* strrchr( const char* str, int ch )
or
char* strrchr( char* str, int ch )
Parameter :The function takes two mandatory parameters which are described below:
- str : specifies the pointer to the null terminated string to be searched for.
- ch: specifies the character to be search for.
Return Value: The function returns a pointer to the last location of ch in string, if the ch is found. If not found, it returns a null pointer.
Below programs illustrate the above function:
Program 1:
// C++ program to illustrate// the strrchr() function#include <bits/stdc++.h>using namespace std; int main(){ // Storing it in string array char string[] = "Geeks for Geeks"; // The character we've to search for char character = 'k'; // Storing in a pointer ptr char* ptr = strrchr(string, character); // ptr-string gives the index location if (ptr) cout << "Last position of " << character << " in " << string << " is " << ptr - string; // If the character we're searching is not present in the array else cout << character << " is not present " << string << endl; return 0;} |
Output:
Last position of k in Geeks for Geeks is 13
Program 2:
// C++ program to illustrate // the strrchr() function#include <bits/stdc++.h>using namespace std; int main(){ // Storing it in string array char string[] = "Geeks for Geeks"; char* ptr; // The character we've to search for char character = 'z'; // Storing in a pointer ptr ptr = strrchr(string, character); // ptr-string gives the index location if (ptr) cout << "Last position of " << character << " in " << string << " is " << ptr - string; // If the character we're searching // is not present in the array else cout << character << " is not present in " << string << endl; return 0;} |
Output:
z is not present in Geeks for Geeks
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