NEED HELD plz (using disk files)
Hello guys (and girls maybe) i am doing a project for school creating a database program and i am having serious problems with creating a log in function to log in users. I am trying to use a text file (the name of the text file is the same as the name of the user) to store the password. When i build the program it builds fine bu when i run the program it always ends abruptly right after the if statement asking the user whether or nor he/she wants to change the password.
ok. it would be helpful if you guys could either show me the code for a simple user log in program using files
or if you have the time
// Returns either 'd' 'o' or 's' depending on the user name entered
correct this functionCode:char login() { FILE *file; char username[25]; char dentist[] = "dentist"; char entered_password[25]; char change; puts("Enter your username"); gets(username); if (strcmp(username,dentist) == 0) /* || The strcmp(string x, string y) function compares 2 strings || It returns 0 if they are identical*/ { puts("Enetr your passowrd (default password is password)"); gets(entered_password); file = fopen("dentist.txt","r"); if (file == NULL) // Prints error message if file could not be opened { puts("Error...................... cannot open file"); puts("the file may not exist"); } // Opens the dentist file for reading char password[25]; // Variable used to store the passoword in the file fscanf(file,"%s",password); // Reads the password and stores it in the variable password if(strcmp(entered_password,password) == 0) { puts("Password correct"); fclose(file); puts("do you want to change your passowrd (y/n)"); scanf("%c",&change); if (change == 'y') { char new_password[25]; // Stores the new password puts("Enter your new passowrd"); gets(new_password); //crashes here!!!!!!!!!!!!!!!!!!!!! file = fopen("dentist.txt","w"); if (file == NULL) { puts("Error................cannot open file"); } // Opens the dentist user file for writing fprintf(file2,"%s",new_password); fclose(file); } return 'd'; } } else // Print error message { puts("no such username exsists"); } }
p.s. I don't expect you to correct the function. Ime just throwing the idea out there just in case.
Originally Posted by tabstop
