Thread: Program optimization

  1. #1
    Registered User
    Join Date
    Apr 2008

    Program optimization

    I have quite a few places in my program where input from the user is required. I want the user to be able to press q at anytime, so that they go back to the beginning of the program (where there is a little menu, and the whole things starts again. You can see in the program where i have an if statement, trying to do this, but it is not a solution for any point in the program.

    Any ideas?

    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <Windows.h>
    int main()
        char *options[100], *as[100], *bs[100], *cs[100], *Xos[100], *Yos[100], *Zos[100], *filename[20];//the s at the end of the name tell me it is stored as a string.
        float a, b, c, Xo, Yo, Zo;
        FILE *recentdata, *EulerData;//pointer to store recent data in text file.
    while (1)
        scanf("%99s", options);
        //What to do if user types exit
        if(strcmpi(options,"exit") == 0)//compare options to "recent" NOT case sensitive.
        //What to do if user types q
        else if(strcmpi(options,"q") == 0)//compare options to "recent" NOT case sensitive.
        //What to do if user types recent
        else if(strcmpi(options,"recent") == 0)//compare options to "recent" NOT case sensitive.
            recentdata = fopen("recentdata.txt", "r");
             fscanf (recentdata, "%s %s %s %s %s %s", as, bs, cs, Xos, Yos, Zos);
        //if the user didnt type recent, they typed something else in...?
        strcpy(as,options);//copy the value of options into as.
        scanf("%99s", bs);
        scanf("%99s", cs);
        printf ("%s %s %s\n\n", as, bs, cs);
        printf("Please input Xo, Yo and Zo\n");
        scanf("%99s", Xos);
        scanf("%99s", Yos);
        scanf("%99s", Zos);
        printf ("%s %s %s\n\n", Xos, Yos, Zos);
        recentdata = fopen("recentdata.txt", "w");
        fprintf(recentdata, "%s %s %s %s %s %s\n", as, bs, cs, Xos, Yos, Zos);
            a=atof(as); //converting strings to floats so that the compiler understands it is a number that can be used mathematically.
            printf (" a = %.2f\n b = %.2f\n c = %.2f\nXo = %.2f\nYo = %.2f\nZo = %.2f\n", a, b, c, Xo, Yo, Zo);
            printf("Beginning execution of improved Euler...\n\n");
            printf("Please enter the name of the file to store the data in\n");
            printf("If it doesnt exist, it will be created.\n\n");
            scanf("%s", filename);
            printf("\nStoring all Data in file '%s.txt'\n", filename);
    return 0;
    int menu()
        printf("Type 'recent' to use the last entered data or:\nInput a, b and c, hitting Enter between each one,\n");
        printf("Typing 'q' at any time will bring you back here,\n");
        printf("To exit the program, from this screen type 'exit'.\n");
    Last edited by a.mlw.walker; 03-27-2009 at 06:08 AM. Reason: noticed an error

  2. #2
    "I Win!" by U. Lose vart's Avatar
    Join Date
    Oct 2006
    Rishon LeZion, Israel
    char *options[100]

    should be
    char options[100]

    for what you want to do is a little bit advanced to implement...

    maybe it will be enough on any step where you ask some input from user check that it is 'q'?

    also - you need to work on your indentation and maybe add more functions like menu() that do small tasks, instead of one long main that is hard to read
    To be or not to be == true

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