Complex program using switch statement

Hi Experts , Please help me the code for below scenarion.

Input Screen 1
Enter the number of tests: 3
Enter 1^st Internal details as below.
Enter Subject 1, Subject2, subject 3 Marks:
Enter 2^nd Internal details below.
Enter Subject 1, Subject2, subject 3 Marks:
Enter 3^rd Internal details below.
Enter Subject 1, Subject2, subject 3 Marks:

Output Screen
Subjects Name Total Marks Avg Marks
S1
S2
S3
Do you want to exit ? y
If “N” Enter new students marks details
Logic:
For each subject the total and averages marks are calculated from the best of 3 internals which are entered.
EX: 15 24 25
After this need to add 25 and 24. Then take Avg and display for each subject
25+24 = 49
49/2 = 24.5

To get 1^st highest score among 3 internals
IF (IA1_S1 >= IA2_S1 AND IA1_S1 >= IA3_S1) then IA1_S1 NULL (Condition fails)
ELSE IF (IA2_S1 >= IA1_S1 AND IA2_S1 >= IA3_S1) THEN IA2_S1 NULL
ELSE IF(IA3_S1 >= IA1_S1 AND IA3_S1 >= IA2_S1) THEN IA3_S1 25
To get 2^nd highest score among 3 internals
IF(IA1_S1 >= IA2_S1 AND IA1_S1 >= IA3_S1)
IF(IA2_S1> IA3_S1) THEN IA2_S1 ELSE IA3_S1 NULL
IF(IA2_S1 >= IA1_S1 AND IA2_S1 >= IA3_S1)
IF(IA1_S1> IA3_S1) THEN IA1_S1 ELSE IA3_S1 NULL
IF(IA3_S1 >= IA1_S1 AND IA3_S1 >= IA2_S1)
IF(IA2_S1> IA1_S1) THEN IA2_S1 ELSE IA1_S1 24

show us your code and we'll help you with it.

Hi Please find my code below. And correct me .

Code:

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Void Main()
{


int test,int tes1,test2,test3;
char s1,s2,s3;
float total,avg;


printf("Enter number of tests") ;
scanf("%d",&test);
for(test=1,test<=&test,test++)
{
        printf("Enter &test details below);
        printf("Enter  Sub1 marks");
        scanf("%d",&s1);
        printf("Enter  Sub2 marks");
        scanf("%d",&s2);
        printf("Enter  Sub3 marks");
        scanf("%d",&s3);
        /*To get 1st highest score among 3 internals*/
        IF (test1_s1>= test2_S1 AND test1_S1 >= test3_S1) then test1_S1 NULL (Condition fails)
        ELSE IF (test2_S1 >= test1_S1 AND test2_S1 >= test3_S1) THEN test2_S1 NULL
        ELSE IF(test3_S1 >= test1_S1 AND test3_S1 >= test2_S1) THEN test3_S1


        /*To get 2nd highest score among 3 internals*/
        IF(test1_S1 >= test2_S1 AND test1_S1 >= test3_S1)
        IF(test2_S1> test3_S1) THEN test2_S1 ELSE test3_S1 NULL
        IF(test2_S1 >= test1_S1 AND test2_S1 >= test3_S1)
        IF(test1_S1> test3_S1) THEN test1_S1 ELSE test3_S1 NULL
        IF(test3_S1 >= test1_S1 AND test3_S1 >= test2_S1)
        IF(test2_S1> test1_S1) THEN test2_S1 ELSE test1_S1
}
}

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There are considerable problems with your code. In fact, they are so severe and so plentiful that I suggest that you take a step back and learn the basics of programming in C before proceeding this with this exercise.

• You should #include the relevant header files.
• Identifiers (names) in C are case-sensitive, so Void Main should be void main.
• Actually, void main should be int main.
• Take a close look at the for loop examples in your learning material. You would see that semi-colons are used.
• You need to understand why &test rather than test should be used in scanf, and hence when you should use test versus &test.
• Check the return value of scanf.
• The if (...) then (...) that you saw in your instructions is effectively pseudocode. You need to write C code, not just copy and paste pseudocode and expect it to work in a C program.

This was also asked and addressed elsewhere.

It is better to leave that as pseudo code. You need to put the results into an array for each student, than compare the three arrays. You can find the highest mark, total marks, or average marks with a loop instead of nested if statements.

Hi Thanks for all your suggestions. Could you please help the code of the above program?

Quote:

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Originally Posted by rajdreams

Could you please help the code of the above program?

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It is your program to write.

Hi I have tried. but i could not able to.. Could you please help me with the correct code?

Quote:

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Originally Posted by rajdreams

Hi I have tried. but i could not able to.. Could you please help me with the correct code?

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I gave you feedback in post #4. That is help that should allow to to come closer to correct code.

If you are looking for me to write the complete program for you... I might do so after you have posted a working version of your program, but until you do so or come sufficiently close to doing so, nope. Such spoonfeeding does you no good and is cheating, and it does me no good should you somehow graduate thanks to all this spoonfeeding and end up working with me.

It is actually a little bit of a hard problem if you have to make comparisons between students marks, for example, take test number 4 and there are 6 students who took that test, now make a comparison between all those students marks. The best way to do this is to use a two dimensional array, which would have rows and columns. You could pass a row or else a column as a function argument instead of having a variable number of arguments. Otherwise you might be stuck with having to have that complicated test case, like in your pseudo code. In addition, since you do not know the number of students taking the tests, that might mean that you would want to use dynamic memory allocation, otherwise you have to make sure that you have a large enough array and set limits on the number of students.

I can see why your are going for this other route.

Hi Fourangles, Thank for your reply. Could you please help me with the code ?

Quote:

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Originally Posted by rajdreams

Could you please help me with the code ?

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What help do you need? Why haven't you tried to make some progress with the suggestions that you have received, whether here or elsewhere?

Quote:

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Originally Posted by rajdreams

Hi Fourangles, Thank for your reply. Could you please help me with the code ?

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I would like to write the program because I would not mind to test out my theory about how to design the program, however laserlight is correct, you should read a few chapters on the c programming language before you try again.