So, my code is supposed to read a file of movies, save the information to an array of structures, and from there we are supposed to execute several options from the user. Afterwards we have to save the information to a new file with the same name.
The options for the user are:
- to insert a movie
- to take a word and search for a movie with that word
- to provide a list of the movies and
- to exit.
So far, my program is working fine mostly. I do have a problem with the insert movie part. The description for the insert movie part is that you have to take in a name for a movie, check the whole array of structures and see if the exact same name is repeated, if not, to enter the movie and its information.
PROBLEMS
For some reason, when I use gets, or fget or getline to take in a name of a movie, my program is not working. It does not let me enter a string and simply fills it out with a line (I think).
Another problem I have is that if I use scanf (just to enter a movie which name is just one word), it works, and it updates the array perfectly. However, even though it updates the array of structure (which I notice because when I want to see a list of movies, the one I inserted shows up), if I try to insert another movie, my program is not using the last movie I inserted to compare to see if it exists.
I am providing my whole program because I do not know if those problems may be happening because some other function of mine is not working properly. The information of the text file is at the bottom, underneath the program. Each line is supposed to be year, genre, ratings, name.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct movies {
int year;
int genre;
float rating;
char name[100];
};
int main(int argc, char *argv[]) {
int a,b,j,k,var,n,option1,f,linenum,i,u;
int pos[10];
struct movies E[200];
char text[50], option[20];
FILE *fp;
//checking to see if there is enough arguments
if (argc<2) {
printf("Error: Some parameters missing.\n");
return -1;
}
//Taking the name of the file
i = 0;
while(argv[1][i]!='\0') {
text[i] = argv[1][i];
i++;
}
text[i]='\0';
//Opening the file
fp=fopen(text,"r");
if(fp==NULL) {
printf("Error opening file.\n");
return -2;
}
//Taking the information from each line of the file
linenum=0;
char line[100];
while (fgets(line,sizeof(line),fp)!=NULL) {
//if there are more than 200 movies break the loop.
if(linenum==199) {
printf("Maximum number of movies allowed is 200\n");
break;
}
int m=sscanf(line,"%i,%i,%f\n", &E[linenum].year, &E[linenum].genre, &E[linenum].rating);
//Extracting the name
j=0;
k=0;
while(line[k]!='\0') {
if(line[k]==',') {
pos[j]=k;
j++;
k++;
}
k++;
}
var=pos[j-1]+1;
n=0;
while(line[var]!='\0') {
E[linenum].name[n]=line[var];
n++;
var++;
}
E[linenum].name[n-1]='\0';
linenum++;
}
fclose(fp);
//Executing the commands and interacting with the user
do {
a=menu();
scanf("%s",option);
f=sscanf(option, "%i", &option1);
if(f!= 1) {
printf("The inserted value is not a number.\n");
continue;
}else {
b=execute(option1,linenum,E,&linenum);
}
}while(b!=-1);
//Writing the file
fp=fopen(text,"w");
if(fp==NULL) {
printf("Error opening file.\n");
return -2;
}
for(u=0;u<=linenum-1;u++) {
fprintf(fp,"%i,%i,%.1f,%s\n",E[u].year,E[u].genre,E[u].rating,E[u].name);
}
fclose(fp);
printf("Good bye!!!\n");
return 0;
}
//Creating a menu
int menu() {
printf("Choose from the options below:\n");
printf("1.Insert a movie\n");
printf("2.Search for movie and see its info\n");
printf("3.List of movies\n");
printf("4.Exit\n");
return 0;
}
//Executing the choice of the user
int execute(int op,int linenum, struct movies *M,int *u) {
int a,b;
if(op==1) {
a=InsertMovie(M,linenum,u);
return 0;
}else if(op==2) {
if(ReadMovie(M,linenum)==0) {
return 0;
}else {
printf("There are no movies with that word. Sorry.\n");
}
return 0;
}else if(op==3) {
b=ListMovies(M,linenum);
return 0;
}else if(op==4) {
return -1;
}else {
printf("Not a valid option. Try again.\n");
return 0;
}
return 0;
}
//Inserting a movie by the user
int InsertMovie(struct movies *M,int linenum,int *u) {
int f,w,x,y1,g1,n1,a;
float r1;
char n[100],y[5],g[2],r[4];
//Entering the name
printf("Insert name of the movie:");
scanf("%s",n);
for(a=0;a<=linenum;a++) {
n1=existent(n,M,a);
if(n1==-1) {
printf("The movie already exists.\n");
return -1;
}else {
//printf("%i\n",linenum);
strcpy(M[linenum].name,n);
}
}
do {
//validating the input of the year and saving the info in the array of structures
printf("Year of the movie: ");
scanf("%s",y);
f=sscanf(y, "%i", &y1);
if(f!= 1) {
printf("The inserted value is not a valid option.\n");
}else {
if(y1<1920 || y1>2016) {
printf("Not a valid year.\n");
}
}
}while(f!=1 || y1<1920 || y1>2016);
M[linenum].year=y1;
do{
//validating the input of the genre and saving it to the array of structures
printf("Genre. For reference see option below:\n");
printf("1.Fantasy\n");
printf("2.Action\n");
printf("3.Comedy\n");
printf("4.Adventure\n");
printf("5.Drama\n");
printf("6.Other\n");
scanf("%s",g);
w=sscanf(g, "%i", &g1);
if(w!= 1) {
printf("The inserted value is not a valid option.\n");
}else {
if(g1<1 || g1>6) {
printf("Not a valid genre.\n");
}
}
}while(w!=1 || g1<1 || g1>6);
M[linenum].genre=g1;
do {
//validating the input of the ratings and saving it to the array of structures
printf("What ratings has this movie (0->lowest,5->highest): ");
scanf("%s",r);
x=sscanf(r, "%f", &r1);
if(x!= 1) {
printf("The inserted value is not valid.\n");
}else {
if(r1<0.0 || r1>5.0) {
printf("Not a valid rating.\n");
}
}
}while(x!=1 || r1<0.0 || r1>5.0);
M[linenum].rating=r1;
//updating the last line of the array
*u=linenum+1;
printf("Thanks!\n");
return 0;
}
//checking to see if a movie exists
int existent(char h[100],struct movies *E,int ind) {
int i,j,k,f,a;
char s[100], new1[100];
j=0;
k=0;
//copying the array to another local array so the original is not transformed
while(h[j]!='\0') {
s[k]=h[j];
k++;
h++;
}
s[k]='\0';
//Making it lower case to better comparison
for(i=0;i<100;i++) {
if((s[i]>=97 && s[i]<=122) || (s[i]>=65 && s[i]<=90)) {
if(s[i]>=65 && s[i]<=90) {
s[i]=s[i]+32;
}
}
}
//Making lower case the names of the movies for better comparison
a=0;
f=0;
while(E[ind].name[f]!='\0') {
if(E[ind].name[f]>=65 && E[ind].name[f]<=90) {
new1[a]=E[ind].name[f]+32;
a++;
}else {
new1[a]=E[ind].name[f];
a++;
}
f++;
}
new1[a-1]='\0';
//Comparing the entered name with the names
if(strlen(s)==strlen(new1)) {
if(strcmp(s,new1)==0) {
return -1;
}
}
return 0;
}
//List of movies
int ListMovies(struct movies *M,int l) {
int i;
printf("The movies are presented in this format: \n");
printf("Year,genre,ratings,name\n");
for(i=0;i<l;i++) {
printf("%i,%i,%.2f,%s\n",M[i].year,M[i].genre,M[i].rating,M[i].name);
}
return 0;
}
//Getting the infromation of a specific movie
int ReadMovie(struct movies *M,int linenum) {
char n[100], titles[200][100],single[100],num[3];
int i,j,len,k,r, length[200];
int num1,h,f,u;
//Entering a word to find a movie
printf("Enter a word to find your movie: \n");
scanf("%s",n);
printf("This titles contain the word you entered:\n");
j=0;
for(i=0;i<linenum;i++) {
//Passing the words to the wordfinder function
if(wordfinder(M,n,i)==0) {
printf("%i.%s\n",j+1,M[i].name);
len=(int)strlen(M[i].name);
length[j]=len;
u=j+1;
for(k=0;k<=len;k++) {
titles[j][k]=M[i].name[k];
}
j++;
}
}
if(j==0) {
return -1;
}
do {
//Validating the insertion of the number of the desired movie
printf("Enter the number of the movie you are looking for.Otherwise to exit the search press 0:\n");
scanf("%s",num);
f=sscanf(num, "%i", &num1);
if(f!= 1) {
printf("The inserted character is not valid.\n");
} else if (num1==0) {
//exit in case dont want to proceed
return 0;
}else {
if(num1<1 || num1>u) {
printf("The number does not indicate a movie.\n");
}
}
}while(f!=1 || num1<1 || num1>u);
for(r=0;r<=length[num1-1];r++) {
single[r]=titles[num1-1][r];
}
//Releasing the information of the desired movie
printf("This is the information for %s\n",single);
for(h=0;h<linenum;h++) {
if(strcmp(single,M[h].name)==0) {
printf("Year: %i\n",M[h].year);
printf("Genre: %i\n",M[h].genre);
printf("Ratings: %.2f\n",M[h].rating);
}
}
return 0;
}
//Finding a word in a string
int wordfinder(struct movies *E,char str[100],int ind) {
char new1[100], new[100][100];
int k,i,j,l,w,r,q;
//Converting to lower case and saving the data to another array
for(k=0;k<100;k++) {
if(E[ind].name[k]>=65 && E[ind].name[k]<=90) {
new1[k]=E[ind].name[k]+32;
}else {
new1[k]=E[ind].name[k];
}
}
//Converting to lower case the entered words
for(i=0;i<100;i++) {
if((str[i]>=97 && str[i]<=122) || (str[i]>=65 && str[i]<=90)) {
if(str[i]>=65 && str[i]<=90) {
str[i]=str[i]+32;
}
}
}
//printf("%s\n",str);
//Saving the words of the titles to a two dimensional array
j=0;
l=0;
w=0;
while(new1[j]!='\0') {
if(new1[j]>=97 && new1[j]<=122) {
new[l][w]=new1[j];
//printf("%c",new[l][w]);
w++;
}else {
new[l][w]='\0';
//printf("\n");
l++;
w=0;
}
j++;
}
//Comparing each individual word of the movie to the entered word
for(q=0;q<=l;q++) {
r=compare(q,new,str);
if(r==0) {
return 0;
}
}
return -1;
}
//Comparing two strings
int compare(int row,char array[100][100],char word[100]) {
int f,h;
char cre[100];
f=0;
h=0;
//Creating an array with the word of the name of the movie
while(array[row][f]!='\0') {
cre[h]=array[row][f];
h++;
f++;
}
cre[h]='\0';
//printf("%s\n",cre);
//if the words are equal then return 0, otherwise -1
if(strcmp(word,cre)==0) {
memset(array,0,10000);
return 0;
}
return -1;
}
Example input:
1939,1,3.9,The Wizard of Oz
1941,2,2.4,Citizen Kane
1972,5,3.3,The Godfather
1949,4,4.8,The Third Man
1964,1,1.1,A Hard Day's Night
1936,3,0.1,Modern Times
1950,5,1.5,All About Eve
1927,4,0,Metropolis
1920,1,2.7,Das Cabinet des Dr. Caligari. (The Cabinet of Dr. Caligari)
1944,4,4.3,Laura
1952,1,1.7,Singin' in the Rain
1938,5,2.5,The Adventures of Robin Hood
1965,2,1.2,Repulsion
1959,1,0.3,North by Northwest
1982,3,2.9,E.T. The Extra-Terrestrial
1933,4,3.8,King Kong
1950,1,2,Sunset Boulevard
1967,4,4.1,La Battaglia di Algeri
1954,3,1,Rear Window
1999,3,4.2,Toy Story 2
1941,3,3.9,The Maltese Falcon
1935,2,2.8,The Bride of Frankenstein
1974,5,3.4,The Godfather (Part II)
1951,4,0.9,Rashomon
2014,4,2.2,Boyhood
1934,5,3.6,It Happened One Night
1964,2,2.8,Dr. Strangelove Or How I Learned to Stop Worrying and Love the Bomb
1937,4,1.8,Snow White and the Seven Dwarfs
2010,4,4.3,Toy Story 3
1949,3,4.2,Ladri di Biciclette (The Bicycle Thief)
1948,2,4.9,The Treasure of the Sierra Madre
1954,4,1.5,Seven Samurai (Shichinin no Samurai)
1959,2,2.4,The 400 Blows (Les Quatre cents coups)
1940,1,4.2,The Philadelphia Story
1931,3,4.7,M
1954,2,0.4,On the Waterfront
2009,3,4.4,Up
1962,4,4.4,Lawrence of Arabia
1955,5,4.1,The Night of the Hunter
1979,4,1.8,Apocalypse Now
1958,4,4.5,Vertigo
1931,2,3.3,Frankenstein
1957,4,1.0,12 Angry Men (Twelve Angry Men)
1997,1,4,L.A. Confidential
1940,4,1.1,Rebecca
2008,2,4,The Wrestler
1951,3,1.2,A Streetcar Named Desire
1940,5,3.6,The Grapes of Wrath
2003,4,3.1,Finding Nemo
1948,1,4.3,The Red Shoes
1970,2,2.9,The Conformist
1940,3,0.6,Pinocchio
1935,1,2.3,The 39 Steps
1953,1,5,The Wages of Fear
1959,5,1.6,Anatomy of a Murder
1975,1,3.7,Jaws
1995,5,4.1,Toy Story
1974,3,2.3,Chinatown
1950,2,4.4,The Rules of the Game
1925,2,2,Battleship Potemkin
2008,1,4.8,Man on Wire
1971,4,3.7,The Last Picture Show
1963,5,3.8,The Leopard
1953,2,1.3,Roman Holiday
1976,2,2.2,Taxi Driver
1925,3,3.5,The Gold Rush
1956,1,4.5,The Searchers
1967,3,2.6,Cool Hand Luke
1977,3,1.7,Annie Hall
1968,4,1.4,Rosemary's Baby
2011,5,2.6,The Artist
1946,5,2.7,The Best Years of Our Lives
1957,3,2.1,Sweet Smell of Success
1964,1,4.9,Mary Poppins
2014,5,4.6,Life Itself
1951,5,1.9,Strangers on a Train
2008,5,4.5,Let the Right One In
2013,1,2.1,Before Midnight
1967,5,0.7,Playtime
2013,3,1.6,Short Term 12
1984,4,4.7,The Terminator
1969,1,3.8,The Wild Bunch
1931,5,2.5,City Lights
2013,2,0.2,Mud
1980,2,0.8,Raging Bull
1974,2,1.9,Badlands
1956,4,3.5,Invasion of the Body Snatchers
1971,3,3.2,The French Connection
1986,5,1.4,Aliens
1957,2,3.9,Kumonosu Jo (Throne of Blood)
1972,5,3.1,The Discreet Charm Of The Bourgeoisie
1980,1,1.3,Airplane!
1973,1,5,Mean Streets
1940,2,3.4,His Girl Friday
1962,5,4,The Manchurian Candidate
1968,5,0.5,Once Upon a Time in the West
1974,4,3,The Conversation
1962,3,3.0,Eyes Without a Face
1956,3,3.2,Forbidden Planet
1997,2,4.6,The Sweet Hereafter
