{"id":15201,"date":"2023-03-30T09:45:23","date_gmt":"2023-03-30T09:45:23","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=15201"},"modified":"2024-01-16T05:57:52","modified_gmt":"2024-01-16T05:57:52","slug":"strstr-function-in-c","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/strstr-function-in-c\/","title":{"rendered":"Strstr() Function in C"},"content":{"rendered":"

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The strstr() function in the C programming language holds a significant role in string manipulation, offering a powerful tool for searching substrings within larger strings. As a part of the string.h library, strstr() provides a versatile means to locate the first occurrence of a substring in a given string, facilitating efficient text processing and pattern matching. In this article, we delve into the intricacies of the strstr() function, exploring its syntax, functionality, and practical applications in C programming.<\/p>\n

What is the strstr() Function in C?<\/h2>\n

The strstr function in c is a predefined function for string handling. is the header file required for string functions. The strstr function in c takes two strings s1 and s2 as arguments and finds the first occurrence of the substring s2 in the string s1. The matching process does not include the terminating null characters (‘0’), but the function terminates there. In simple words, The strstr function is a useful library function in C programming that is used to find a substring within a string<\/p>\n

Syntax of strstr() Function in C<\/h3>\n

Here we have the syntax of strtstr function in c<\/p>\n

char *strstr(const char *string, const char *substring);<\/code><\/pre>\n
strstr function in c takes two arguments, the first argument is a string and second argument is substring,so strstr function re3turn pointer to first occurrence of the substring within the string<\/p>\n
Let’s take a closer look at the parameters and return value of the strstr() function:<\/p>\n
Parameters of strstr() Function in C<\/h3>\n
The strstr() function takes two parameters:<\/p>\n
    \n
  • string<\/strong> – This is a pointer to the string that is to be searched.<\/li>\n
  • substring<\/strong> – This is a pointer to the substring that is to be searched for within the string.<\/li>\n<\/ul>\n
    Both the string and substring arguments must be null-terminated strings.<\/p>\n
    Return Value of strstr()  Function in C<\/h3>\n
    The strstr() function returns a pointer to the first occurrence of the substring within the string, or a null pointer if the substring is not found.<\/p>\n
    If the substring is an empty string, then the strstr() function returns a pointer to the string.<\/p>\n
    Example of strstr()  Function in C<\/h3>\n
    Let’s look at an example to understand how the strstr() function works:<\/p>\n\t\t\t\t\t\t