LectureTwentyone - Lecture 21 Pointers – Part III By...

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Unformatted text preview: Lecture 21 Pointers – Part III By Ghada Al-Mashaqbeh The Hashemite University Computer Engineering Department The Hashemite University ٢ Arrays of Pointers ¡ Arrays can contain pointers ¡ Commonly used to store an array of strings char *suit[ 4 ] = {"Hearts", "Diamonds", "Clubs", "Spades" }; ¡ Each element of suit is a pointer to a char * (a string) ¡ The strings are not in the array, only pointers to the strings are in the array ¡ suit array has a fixed size, but strings can be of any size suit[3] suit[2] suit[1] suit[0] ’H’ ’e’ ’a’ ’r’ ’t’ ’s’ ’\0’ ’D’ ’i’ ’a’ ’m’ ’o’ ’n’ ’d’ ’s’ ’\0’ ’C’ ’l’ ’u’ ’b’ ’s’ ’\0’ ’S’ ’p’ ’a’ ’d’ ’e’ ’s’ ’\0’ The Hashemite University ٣ Function Pointers I ¡ Pointers to functions ¡ Contain the address of the function ¡ Similar to how an array name is the address of its first element ¡ Function name is starting address of code that defines function ¡ Function pointers can be ¡ Passed to functions ¡ Stored in arrays ¡ Assigned to other function pointers The Hashemite University ٤ Function Pointers II ¡ Example: bubblesort ¡ Function bubble takes a function pointer ¡ The function determines whether the the array is sorted into ascending or descending sorting ¡ The argument in bubble for the function pointer bool ( *compare )( int, int )...
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LectureTwentyone - Lecture 21 Pointers – Part III By...

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