Ignoramus needs help with a Simple Grade program.

Hello Everyone, I'm new to this board. I'm taking a class of which I have not taken the prerequisite. I have never programmed before, and now I have a simple program due tomorrow, and I'm at a loss at how to do it. Here's the problem

“Write a program that predicts the score needed on a final exam to achieve a desired grade in a course. The program should interact with the user as follows:
Enter desired grade> B
Enter minimum average required> 79.5
Enter current average in course> 74.6
Enter how much the final counts
as a percentage of the course grade> 25
You need a score of 94.20 on the final to get a B.”

I have no idea how to deal with the letter 'B' How do I assign a value to it? How do I use printf and scanf with this variable? I can manage the numerical operations, but I just really need help with the letter part of this assignment. Please let me know if you need clarification. Thanks!

- Kurt

Code:

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      1 # include <stdio.h>
      2
      3 int main ()
      4
      5 {
      6
      7   
      8    double desired, minimum, current, final;
      9    printf("Enter desired grade> ");
    10    scanf("%lf", &desired);
    11    printf("Enter minimum average required> ");
    12    scanf("%lf", &minimum);
    13    printf("Enter current average in course> ");
    14    scanf("%lf", &current);
    15    printf("Enter how much the final counts\n");
    16    printf("as a percentage of the course grade> ");
    17    scanf("%lf", final);
    18
    19 }
~

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Attachment 12049

You should read about scanf
http://www.cplusplus.com/reference/c.../cstdio/scanf/

The information is almost all C (instead of C++ as newbies sometimes think) on the link above.

Code:

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#include <stdio.h>

int main ()
{
    char desired;
    double minimum, current, final;
    printf("Enter desired grade> ");
    scanf(" %c", &desired);
    printf("Enter minimum average required> ");
    scanf("%lf", &minimum);
    printf("Enter current average in course> ");
    scanf("%lf", &current);
    printf("Enter how much the final counts\n");
    printf("as a percentage of the course grade> ");
    scanf("%lf", &final);


    return 0;

}

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I changed grade to be a char.

The space before the %c skips over the possible space/newlines.

Code:

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scanf(" %c", &desired);

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Tim S.

Quote:

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I'm taking a class of which I have not taken the prerequisite

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Here is a link that can help you C Tutorial - Learn C - Cprogramming.com

Start at "Intro to C" and work your way though

Also note that it is against forum policy to do your homework for you.

Quote:

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Originally Posted by Click_here

Here is a link that can help you C Tutorial - Learn C - Cprogramming.com

Start at "Intro to C" and work your way though

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You should also read over the input/output intro to C stuff in the Intro.
Link to output FAQ; I could not find the input of char FAQ.

FAQ > Format output using printf() (C) - Cprogramming.com

Hey everyone, I got the thing to work. Thanks for your help. The tutorial helped a lot, but now I have another question! I will create a new thread.

Quote:

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Originally Posted by Click_here

Also note that it is against forum policy to do your homework for you.

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Please note that the OP clearly stated the specs, the problem, and also some code, in addition to their question. I personally don't see anything here that goes against the homework policy.

Quote:

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Originally Posted by Matticus

Please note that the OP clearly stated the specs, the problem, and also some code, in addition to their question. I personally don't see anything here that goes against the homework policy.

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I never said that it did - It was my way of saying that they should be aware that they need to do the work.

I get suspicious whenever I see something like, "I have a simple program due tomorrow, and I'm at a loss at how to do it".

You're right that it was a unnecessary.