Go4Expert - scanf, gets and fflush problems

Go4Expert (http://www.go4expert.com/)

- C (http://www.go4expert.com/forumdisplay.php?f=20)

- - scanf, gets and fflush problems (http://www.go4expert.com/showthread.php?t=27499)

scanf, gets and fflush problems

This is the code:

Code:

/**********************************/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>



#define MAX 100



void print_menu(int n);



void main()

{

    int c, a[MAX],temp[MAX],reg,top = 0;

    char carname[80];

    FILE *fp;            

                                            

    print_menu(1);



    scanf_s("%d", &c);

    while (c != 2)

    {

        if (c == 1)

        {

            // Scan in registration

            printf("Please enter Taxi Registration Number\n");

            scanf("%d", &reg);

            a[top] = reg;

            top++;



if((fp = fopen("Taxi Information.txt", "w"))==NULL) {               

printf("Cannot open file.\n");                                      

exit(1);                                                     

}

do {

   printf ("Please enter the car name (CR to quit):\n");

   fflush (stdout);

   /* get the car name */

   gets(carname);

   strcat (carname, "\n");

   fputs (carname, fp);

} while (*carname != '\n');    



fclose(fp);

// Call print_menu

print_menu(1);

scanf("%d", &c);

        }

        else if (c == 2) 

        {

            //remove from front

            int b;

    

            for(b = 0; b <= top; b++)

            {

                temp[b] = a[b+1];

            }



            for (b = 0; b <= top; b++)

            {

                a[b] = temp[b];

            }



            top--;

            printf("Taxi has left\n");

            //print menu

            print_menu(1);

            scanf("%d", &c);

        }

    }

}

// Print menu

void print_menu(int n)

{

    printf(" 1. Arrive \n");

    printf(" 2. Leave  \n");    

}

/**********************************/

The problem is:
After choosing "1", it does not stop at "Please enter the car name (CR to quit)".

Thanks

Re: scanf, gets and fflush problems

after each scanf you use add a getchar command

Code:

........

scanf(....);

getchar();

........

Re: scanf, gets and fflush problems

Thanks alot. This solved part of the problem and created another problem. Only the last typed characters are saved in the text file. I mean, if you keep chosing option 1 and type characters and again you choose option 1 and type characters, and then you leave the loop and check the text file, you will find that it only keeps the characters that were written in the last iteration.

Re: scanf, gets and fflush problems

Quote:

Originally Posted by silviatodorof (Post 90842)

Code:

...........

   if((fp = fopen("Taxi Information.txt", "w"))==NULL) {  

.........

change "w" with "a"

Re: scanf, gets and fflush problems

Yeah, this was perfect, it works. Now how I can write the "taxi registration number" - reg, to the text file.

Many Thanks