Jan 4th, 2025 at 18:13
Jan 4th, 2025 at 18:13
Price: $ 0
The strstr() function in C++ cstring strstr() is part of the C-string library <cstring> and is used to locate the first occurrence of a substring in a larger string. It returns a pointer to the first character of the substring if found, or nullptr if the substring is not found.
Syntax:
char* strstr(const char* haystack, const char* needle);
Parameters:
haystack: The string to be searched.
needle: The substring to search for within haystack.
Example Usage:
#include <iostream>
#include <cstring>
int main() {
const char* text = "Hello, welcome to the world of C++ programming.";
const char* search = "C++";
char* result = strstr(text, search);
if (result != nullptr) {
std::cout << "Substring found at: " << result << std::endl;
} else {
std::cout << "Substring not found." << std::endl;
}
return 0;
}
Key Points:
strstr() is case-sensitive.
Returns a pointer to the first occurrence of the substring or nullptr if not found.
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