Writing C Program(s) Using Dynamic Data Structures

// approach is to use recursion.

Listing 17.1 The films1.c Program/* films1.c -- using an array of structures */#include <stdio.h>#include <string.h>#define TSIZE 45 /* size of array to hold title */#define FMAX 5 /* maximum number of film titles */struct film {char title[TSIZE];int rating;};char * s_gets(char * st, int n);int main(void){struct film movies[FMAX];int i = 0;int j;puts("Enter first movie title:");while (i < FMAX && s_gets(movies[i].title, TSIZE) != NULL &&movies[i].title[0] != '\0'){puts("Enter your rating <0-10>:");scanf("%d", &movies[i++].rating);while(getchar() != '\n')continue;puts("Enter next movie title (empty line to stop):");}if (i == 0)printf("No data entered. ");elseprintf ("Here is the movie list:\n");for (j = 0; j < i; j++)printf("Movie: %s Rating: %d\n", movies[j].title,movies[j].rating);

printf("Bye!\n");return 0;}char * s_gets(char * st, int n){char * ret_val;char * find;ret_val = fgets(st, n, stdin);if (ret_val){find = strchr(st, '\n'); // look for newlineif (find) // if the address is not NULL,*find = '\0'; // place a null character thereelsewhile (getchar() != '\n')continue; // dispose of rest of line}return ret_val;}