Thread: help i cant get it working

One thing I noticed when opening in a syntax-highlighting text editor (SciTE)...some of your printfs have extra quotes.

Originally Posted by rags_to_riches

One thing I noticed when opening in a syntax-highlighting text editor (SciTE)...some of your printfs have extra quotes.

He is right. Also i think you like to do

Code:

    do
     {
       printf("enter option here: ");
       scanf("%d",&option);
       switch ( option )

instead of

Code:

printf("enter option here: ");
	scanf("%d",&option);
	do
	{

	switch ( option )

ive taken you guy's advice thanks alot. and this is an revised version of the program. but i still have errors. can anyone help me with it. i still can't figure out how to solve it. thanks. if possible correct the source code and post it up. thanks alot.

Remove all those defines.

Code:

//#define char f;

Local function definitions are illegal (INDENT PROPERLY and you wouldn't have this problem!):

Code:

void Sem_1 ( void )

Void is not necessary for inside argument lists in C++ (which is what you're compiling it as):

Code:

void Sem_1 ()

Due your indentation problem, the code is all in the wrong places because you missed a }:

Code:

	do
	{

		printf("enter option here: ");
		scanf("%d",&option);
		switch ( option )
		{
		case 1:

			system ( "cls" );
			Sem_1();

			break;

		case 2:

			system ( "cls" );
			Sem_2();

			break;

		case 3:

			system ( "cls" );
			Sem_3();

			break;
		}
	}
	while( option > 4 || option < 4 ); 
	return 0;
}

Missing ;

Code:

int back_1;

writing_for_mass_communication: undeclared variable.

Code:

writing_for_mass_communication = Score * 3;

Code:

Score * 3 = computer_studies;

Perhaps you intended:

Code:

computer_studies = Score * 3;

Missing ;

Code:

printf("press 0 to go back to option menu");

Code:

scanf("%d", &back_1);

computer_studies: undeclared variable.

Code:

computer_studies = Score * 3;

gpa_sem_1: undeclared variable.

Code:

cgpa_sem_2 = ( ( gpa_sem_1 + gpa_sem_2 ) / 2 );

Missing ;

Code:

printf("press 0 to go back to option menu");
scanf("%d", &back_2);

gpa_sem_1, gpa_sem_2: undeclared variables.

Code:

cgpa_sem_3 = ( ( gpa_sem_1 + gpa_sem_2 + gpa_sem_3 ) / 3 );

Missing ;

Code:

printf("press 0 to go back to option menu")
scanf("%d", &back_3)

Completely wrong in all sorts of ways and expectations.

Code:

	if (strcmp( Grade, A+ || a+ == 0 ))
	{
		Score += 4.00;
	}
	else if (strcmp( Grade, A- || a- == 0 ))
	{
		Score += 3.70;
	}
	else if (strcmp( Grade, B+ || b+ == 0 ))
	{
		Score += 3.30;
	}
	else if (strcmp( Grade, B || b == 0 ))
	{
		Score += 3.00;
	}
	else if (strcmp( Grade, B- || b- == 0))
	{
		Score += 2.70;
	}
	else if (strcmp( Grade, C+ || c+ == 0 ))
	{
		Score += 2.30;
	}
	else if (strcmp( Grade, C || c == 0 ))
	{
		Score += 2.00;
	}
	else if (strcmp( Grade, D || d == 0 ))
	{
		Score += 1.00;
	}
	else if (strcmp( Grade, F || f == 0 ))
	{
		Score += 0.00;
	}
	else
	{
		printf( "invalid grade\n" );
		printf( "please enter again: " );
	}

Score: undeclared variable.

Code:

Score += 4.00;

Uninitialized variables public_speaking and writing_for_mass_communication used.

Code:

gpa_sem_1 = ( ( english_language + public_speaking + principles_of_accounting + 
principles_of_economics + general_mathematics_1 + computer_studies ) / 18 );

You obviously know nothing about C or C++. Go back to school. This isn't a playground.
Make a real effort in making a program and start of small. When you've mastered the basics, come back and we'll help you.

how do i solve the three unresolced external symbols. i know it has got to do i with the function calling. but not sure how to solve it.
any advice on what logic should i use to do error warnings and go back to the previous data entry.
i am feeling the error is from this part but i am not sure what is it trying to point out.

//function prototype
double sem_1 ( void );
double sem_2 ( double );
double sem_3 ( double, double );

thanks for you help.

If you post WHICH symbols are unresolved, then that would help us quite a bit.

--
Mats

Why your c file has cpp extention? cpp is for C++, C-file in general have to have c-extention

C code can be compiled as C++ code, and to be honest, I would recommend it that way.

Originally Posted by Elysia

C code can be compiled as C++ code, and to be honest, I would recommend it that way.

I wouldn't. If you want to write C++ - do it. If you are using C - use it. Do not mix 2 different languages in one compilation unit

But if i have C code i need to use in C++, would the recommended way be linking the object files to a library and #including their interface? When i inline functions in C header files, either as #define Macros or using the inline directive, then there are issues i should care for? I have not used C++ that much, but am not a total stranger, and i would like to know what is the best way to make both happy.

Originally Posted by Elysia

C code can be compiled as C++ code

That's not entirely true, this is legal C code, but it won't compile on a C++ compiler for obvious reasons:

Code:

int class = 0;

This ofcourse applies to all keywords in C++ that C doesn't have. Also, why would you recommend a C++ compiler for C code?

C++ has a stronger type-checking than C, so that would be one reason to compile code with C++ compiler even tho' the code itself is C.

--
Mats