strcspn() function in C/C++
The strcspn() function in C/C++ takes two string as input, string_1 and string_2 as it’s argument and searches string_1 by traversing for any characters that is present in string_2 . The function will return the length of string_1 if none of the characters of string_2 are found in string_1 . This function is defined in cstring header file .
Syntax :
size_t strcspn ( const char *string_1, const char *string_2 )
Parameters : The function accepts two mandatory parameters which are described below:
- string_1: specifies the string to be searched
- string_2: specifies the string containing the characters to be matched
Return Value : This function returns the number of character traversed in string_1 before any of the character matched from string_2 .
Below programs illustrate the above function:
Program 1:
CPP
// C++ program to illustrate the // strcspn() function #include <bits/stdc++.h> using namespace std; int main() { // String to be traversed char string_1[] = "geekforBeginner456"; // Search these characters in string_1 char string_2[] = "123456789"; // function strcspn() traverse the string_1 // and search the characters of string_2 size_t match = strcspn (string_1, string_2); // if matched return the position number if (match < strlen (string_1)) cout << "The number of characters before" << "the matched character are " << match; else cout << string_1 << " didn't matched any character from string_2 "; return 0; } |
Output:
The number of characters beforethe matched character are 12
Program 2:
CPP
// C++ program to illustrate the // strcspn() function When the string // containing the character to be // matched is empty #include <bits/stdc++.h> using namespace std; int main() { // String to be traversed char string_1[] = "geekforBeginner456"; // Search these characters in string_1 char string_2[] = ""; // Empty // function strcspn() traverse the string_1 // and search the characters of string_2 size_t match = strcspn (string_1, string_2); // if matched return the position number if (match < strlen (string_1)) cout << "The number of character before" << "the matched character are " << match; else cout << string_1 << " didn't matched any character from string_2 "; return 0; } |
Output:
geekforBeginner456 didn't matched any character from string_2
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