Searches a memory block for a given byte value #include <string.h> void *memchr ( const void *buffer , int c , size_t n ); The memchr( ) function searches for a byte with the value of c in a buffer of n bytes beginning at the address in the pointer argument buffer. The function's return value is a pointer to the first occurrence of the specified character in the buffer, or a null pointer if the character does not occur within the specified number of bytes. The type size_t is defined in string.h (and other header files), usually as unsigned int. Examplechar *found, buffer[4096] = ""; int ch = ' '; fgets( buffer, sizeof(buffer), stdin ); /* Replace any spaces in the string read with underscores: */ while (( found = memchr( buffer, ch, strlen(buffer) )) != NULL ) *found = '_'; See Alsostrchr( ), wmemchr( ) |