strchr
From cppreference.com
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Defined in header
<string.h>
|
||
|
char
*
strchr
(
const
char
*
str,
int
ch
)
;
|
(1) | |
|
/*QChar*/
*
strchr
(
/*QChar*/
*
str,
int
ch
)
;
|
(2) | (since C23) |
1)
Finds the first occurrence of
ch
(after conversion to
char
as if by
(
char
)
ch
) in the null-terminated byte string pointed to by
str
(each character interpreted as
unsigned
char
). The terminating null character is considered to be a part of the string and can be found when searching for
'
\0
'
.
2)
Type-generic function equivalent to
(1)
. Let
T
be an unqualified character object type.
-
-
If
stris of type const T * , the return type is const char * . -
Otherwise, if
stris of type T * , the return type is char * . - Otherwise, the behavior is undefined.
-
If
The behavior is undefined if str is not a pointer to a null-terminated byte string.
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 null pointer if no such character is found.
Example
Run this code
#include <stdio.h> #include <string.h> int main(void) { const char *str = "Try not. Do, or do not. There is no try."; char target = 'T'; const char* result = str; while((result = strchr(result, target)) != NULL) { printf("Found '%c' starting at '%s'\n", target, result); ++result; // Increment result, otherwise we'll find target at the same location } }
Output:
Found 'T' starting at 'Try not. Do, or do not. There is no try.' Found 'T' starting at 'There is no try.'
References
- C23 standard (ISO/IEC 9899:2024):
-
- 7.24.5.2 The strchr function (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
-
- 7.24.5.2 The strchr function (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
-
- 7.24.5.2 The strchr function (p: 367-368)
- C99 standard (ISO/IEC 9899:1999):
-
- 7.21.5.2 The strchr function (p: 330)
- C89/C90 standard (ISO/IEC 9899:1990):
-
- 4.11.5.2 The strchr function
See also
|
searches an array for the first occurrence of a character
(function) |
|
|
finds the last occurrence of a character
(function) |
|
|
finds the first location of any character in one string, in another string
(function) |
|
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C++ documentation
for
strchr
|
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