Find the first occurrence of a character in a string
#include <string.h> char* strchr(char* s, int c );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The strchr() function finds the first occurrence of c (converted to a char) in the string pointed to by s. The terminating NUL character is considered to be part of the string.
A pointer to the located character, or NULL if c doesn't occur in the string.
#include <stdio.h> #include <string.h> #include <stdlib.h> int main( void ) { char buffer[80]; char* where; strcpy( buffer, "video x-rays" ); where = strchr( buffer, 'x' ); if( where == NULL ) { printf( "'x' not found\n" ); } else { printf( "'x' found: %s\n", where ); } return EXIT_SUCCESS; }
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |
memchr(), strcspn(), strpbrk(), strrchr(), strspn(), strstr(), strtok(), strtok_r(), wcschr(), wcscspn(), wcspbrk(), wcsrchr(), wcsspn(), wcsstr(), wcstok()