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#include <stdio.h> #include <math.h> #include <ctype.h> #include <string.h> #include <stdlib.h> #include <boolean.h> #include <database.h> #define STRICMP_ERROR -2 #define TEMP_BUF 256 #define STRICMP_LESS -1 #define STRICMP_EQUAL 0 #define STRICMP_GREATER 1 #define TRUE 0 #define FALSE -1 #define HUND 100 typedef struct { char number[17]; char name[65]; int credit; int lab; COURSE* next; COURSE* previous; } COURSE; void initialize_database(void); // allows the user to populate a new record void add_course(COURSE* course[HUND]); // inserts a new course record into the linked list void delete_course(COURSE* course[HUND]); // removes a course record from the linked list void search_course(COURSE* course[HUND]); // searches the linked list for a specific COURSE.number void display_course(COURSE* course[HUND]); // displays the contents of a record void sort(COURSE* course[HUND], unsigned size); // alphabetizes linked list by numbers void save_database(COURSE* course[HUND]); // writes a record to a text file void read_database(COURSE* course[HUND]); // opens a linked list void close_database(FILE* dbase); // closes a linked list int stricmp(char* string1, char*string2); // compares two strings BOOLEAN order(char* string1, char* string2); // alphabetizes linked list int main(void) { COURSE course[100]; int i=0; int j=0; int t=0; int choice; char junk; // user input do{ printf("Which of the following actions would you like to perform, hit the number then hit enter?\n 1) Open a Database\n 2) Search a Database\n 3) Add a New Course\n 4) Delete a Course\n 5) Initialize Database\n 6) Save Database\n 7) Read Database\n 8) Close Database\n 9) Quit the System: \n"); scanf("%d", &choice); scanf("%c", &junk); switch(choice) { case 1: open_database; break; case 2: search_course; break; case 3: add_course; break; case 4: delete_course; break; case 5: initialize_database; break; case 6: save_database; break; case 7: read_database; break; case 8: close_database; break; case 9: t = -99; break; default: printf("Invalid Input\n"); break; } } while(t != -99); return(0); } /*****************************************************************************************************************************************/ void open_database(void){ FILE* inp; COURSE* buffer[HUND]; fgets("buffer", HUND, inp); if(inp = fopen(buffer, "rt") != NULL){ } else{ printf("\n\aCan't open file\n"); } sort(course, HUND); save_database(buffer[HUND]); return; } /*****************************************************************************************************************************************/ void add_course(COURSE* course[HUND]) { int case_status; char ch; int i=0; int j=0; int k=0; while(course[i].number != -99) { i++; } printf("Enter the name of the course: \n"); while((ch = getchar()) != '\n') { course[i].name[j] = ch; j++; } course[i].name[j] = '\0'; j = 0; printf("Enter the course number: \n"); while((ch = getchar()) != '\n') { course[i].number[k] = ch; k++; } course[i].number[j] = '\0' ; k = 0; printf("\n"); printf("Does the course hvae a Lab:\n" "1)Yes or\n" "2) No" ); scanf("%d", &case_status); if (case_status == 1) { course[i].credit = 4.00; course[i].lab = TRUE; } else if (case_status == 2) { course[i].credit = 3.00; course[i].lab = FALSE; } else { printf("Not a valid option\n"); } printf("Course %s was added to the database\n\n", course[i].name[j]); save_database(course[HUND]); return; } /************************************************************************************************************************************************/ void delete_course(COURSE* course[]) { int i; int k; int j; printf("Enter the course number: "); scanf("%d", &k); for(i=0;i<100;i++) { if (k == course[i].number) { course[i] = '\0'; printf("The course %d was successfully deteled from the database\n\n", course[i].number); }else{ ptintf("\nThere is no course with that number. Please try again.\n"); } } return; } /***************************************************************************************************************************************************/ void search_course(COURSE* course[]) { int num; int i; int j; printf("Enter the course number of the course you would like to search for: "); scanf("%d", &num); for(i = 0; i < 100; i++) if(num == course[i].number) { printf("Name: "); for(j=0;j<10;j++) { printf("%c", course[i].name[j]); } printf("\n"); printf("Number: %d.\n", course[i].number); } if(course[i].lab == 4.00) { printf("Lab: Yes\n"); } else { printf("Lab: No\n"); } return(course[HUND]); } /******************************************************************************************************************************************************/ BOOLEAN order(char* string1, char* string2) { int result; BOOLEAN compare; result = stricmp(string1, string2); if (result > 0) { compare = -1; } else { compare = 0; } return(compare); } /********************************************************************************************************************************************************/ void sort(COURSE* course[HUND], unsigned size){ int i; int j; int n; for(j = 0; j < size; j++) { for(n = 0; n < size-1; n++) { i = order(course[n].name, course[n+1].name); if (i == -1) { course[n].next = course[n+1].next; course[n+1].next = course[n-1].next; course[n+1].previous = course[n].previous; course[n].previous = course[n+2].previous; } } } return; } /************************************************************************************************************************************************/ int stricmp(char* string1, char* string2){ char char1; char char2; int i = 0; int ans = STRICMP_ERROR; if(string1 && string2){ while(ans == STRICMP_ERROR){ char1 = tolower(string1[i]); char2 = tolower(string2[i]); if(char1 < char2) ans = STRICMP_LESS; else if(char1 > char2) ans = STRICMP_GREATER; else if(!char1 && !char2) ans = STRICMP_EQUAL; else i++; } } return(ans); } /********************************************************************************************************************************************************/ void close_database(COURSE* course[HUND]){ FILE *outp; outp = save_database(course[HUND]); fclose(outp); return; } /********************************************************************************************************************************************************/ void save_database(COURSE* course[HUND]){ int status; FILE* outp; COURSE* buffer[HUND]; printf("\nWould you like to save?\n"); printf("1) Yes or\n"); printf("2) No"); scanf("%d", &status); buffer[HUND] = course[HUND]; if (status == 1) { fgets(buffer, HUND, outp); if(outp = fopen(buffer, "wt") != NULL){ } else{ printf("\n\aCan't open file\n"); } } else { printf("Not a valid option\n"); } return; } /*******************************************************************************************/ void close_database(FILE* dbase) { char ans1; char ans2; printf("Are you sure you want close the database?(y/n) "); ans1 = getchar(); if (ans1 == 'y' || ans1 == 'Y'); { printf("Would you like to save any changes you've made?(y/n) "); ans2 = getchar(); if (ans2 == 'y' || ans2 == 'Y') { save_database(dbase); } fclose(dbase); } return; }