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# std::strstr

From cppreference.com
< cpp‎ | string‎ | byte

Defined in header `<cstring>` |  |
const char* strstr( const char* str, const char* target ); |  |
char* strstr( char* str, const char* target ); |  |

Finds the first occurrence of the byte string `target` in the byte string pointed to by `str`. The terminating null characters are not compared.

### [edit] Parameters

str | - | pointer to the null-terminated byte string to examine
target | - | pointer to the null-terminated byte string to search for

### [edit] Return value

Pointer to the first character of the found substring in `str`, or NULL if no such character is found. If `target` points to an empty string, `str` is returned.

### [edit] Example

Run this code

    #include <iostream>
    #include <cstring>

    int main()
    {
        const char *str = "Try not. Do, or do not. There is no try.";
        const char *target = "not";
        const char *result = str;

        while ((result = std::strstr(result, target)) != NULL) {
            std::cout << "Found '" << target
                      << "' starting at '" << result << "'\n";

            // Increment result, otherwise we'll find target at the same location
            ++result;
        }
    }

Output:

    Found 'not' starting at 'not. Do, or do not. There is no try.'
    Found 'not' starting at 'not. There is no try.'

### [edit] See also

find | find characters in the string (public member function of `std::basic_string`) [edit]
wcsstr | finds the first occurrence of a wide string within another wide string (function) [edit]
strchr | finds the first occurrence of a character (function) [edit]
strrchr | finds the last occurrence of a character (function) [edit]
C documentation for strstr

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