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strchr() Function in C++
In C++, strchr() is a predefined function. It is used for string handling and it returns the first occurance of a given character in the string provided.
The syntax of strchr() is given as follows.
char *strchr( const char *str, int c)
In the above syntax, str is the string that contains the character c. The strchr() function finds the first occurrence of c in str.
A program that demonstrates the strchr() function is given as follows.
Example
#include <iostream>
#include <cstring>
using namespace std;
int main() {
char str[] = "strings";
char * c = strchr(str,'s');
cout << "First occurrence of character "<< *c <<" in the string is at position "<< c - str + 1;
return 0;
}Output
First occurrence of character s in the string is at position 1
In the above program, first the string str is defined. Then pointer c points to the first occurrence of character s in the given string. This is obtained using strchr(). The position of s is displayed using cout. All this is given in the following code snippet.
char str[] = "strings"; char * c = strchr(str,'s'); cout << "First occurrence of character "<< *c <<" in the string is at position "<< c - str + 1;
The strchr() function can also be used to display the string after the first occurance of a particular character i.e it can display the suffix of the string. A program demonstrating this is as follows.
Example
#include <iostream>
#include <cstring>
using namespace std;
int main() {
char str[] = "strings";
char * c = strchr(str,'i');
cout << "Remaining string after first occurance of "<< *c <<" is "<< c ;
return 0;
}Output
Remaining string after first occurance of i is ings
In the above program, first the string str is defined. Then pointer c points to the first occurrence of character s in the given string. This is obtained using strchr(). The rest of the string from the position pointed to by c is printed using cout. All this is given in the following code snippet.
char str[] = "strings"; char * c = strchr(str,'i'); cout << "Remaining string after first occurance of "<< *c <<" is "<< c ;
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