std::strchr

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

Strings library

Null-terminated strings

Byte strings

Multibyte strings

Wide strings

Classes

basic_string

basic_string_view (C++17)

char_traits

Null-terminated byte strings

Functions
Character manipulation
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
Conversions to numeric formats
atof atoiatolatoll (C++11) strtolstrtoll (C++11)	strtoulstrtoull (C++11) strtofstrtodstrtold (C++11)(C++11) strtoimaxstrtouimax (C++11)(C++11)
String manipulation
strcpy
strncpy
strcat
strncat
strxfrm
String examination
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
Memory manipulation
memchr
memcmp
memset
memcpy
memmove
Miscellaneous
strerror

Defined in header <cstring>
const char* strchr( const char* str, int ch );
char* strchr( char* str, int ch );

Finds the first occurrence of the character static_cast<char>(ch) in the byte string pointed to by str.

The terminating null character is considered to be a part of the string and can be found if searching for '\0'.

Parameters

str	-	pointer to the null-terminated byte string to be analyzed
ch	-	character to search for

Return value

Pointer to the found character in str, or a null pointer if no such character is found.

Example

Run this code

#include <iostream>
#include <cstring>

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

  while ((result = std::strchr(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 'T' starting at 'Try not. Do, or do not. There is no try.'
Found 'T' starting at 'There is no try.'

See also

memchr	searches an array for the first occurrence of a character (function)
find	find characters in the string (public member function of std::basic_string)
wcschr	finds the first occurrence of a wide character in a wide string (function)
strrchr	finds the last occurrence of a character (function)
strpbrk	finds the first location of any character from a set of separators (function)