strstr() is a C standard library string function as defined in string.h. strstr() has the function signature char * strstr(const char *haystack, const char *needle); which returns a pointer to a character at the first index where needle is in haystack, or NULL if not present.
This function takes two strings s1 and s2 as an argument and finds the first occurrence of the sub-string s2 in the string s1.
char *strstr (const char *s1, const char *s2);
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Functions | Description |
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strcat( ) | The strcat() function is used to concatenate one string(source) at the end of another string(destination). |
strncat( ) | Appends first n characters of a string at the end of another. |
strcpy( ) | Copies from str2 into str1 |
strncpy( ) | Copies given number of characters of one string to another |
strlen( ) | Gives the length of str1 |
strcmp( ) | Returns 0 if str1 is same as str2. Returns <0 if strl < str2. Returns >0 if str1 > str2 |
strcmpi( ) | Same as strcmp() function. But, this function negotiates case. “A” and “a” are treated as same. |
strchr( ) | Returns pointer to first occurrence of char in str1 |
strrchr( ) | last occurrence of given character in a string is found. |
strstr( ) | Returns pointer to first occurrence of str2 in str1 |
strrstr( ) | Returns pointer to last occurrence of str2 in str1 |
strdup( ) | Duplicates the string |
strlwr( ) | Converts string to lowercase |
strupr( ) | Converts string to uppercase |
strrev( ) | Reverses the given string |
strset( ) | Sets all character in a string to given character |
strnset( ) | It sets the portion of characters in a string to given character |
strtok( ) | Tokenizing given string using delimiter |