I'm new to programming in C, in fact I'm new to programming altogether. I have to write a program in C that:
computes the duration of a projectile's flight and it's height above the ground when it reaches the target.
Problem constant
G 32.17 (gravitational constant)
Problem Inputs
double theta (input angle)
double distance (distance to target)
double velocity (projectile velocity)
Problem outputs
double time (time of flight)
double height (height at impact)
relevant formulas
time=distance/ velocity x cos(theta)
height= velocity x sin(theta) x time - (g x time^2)/2

That is all of the info given in the book. I have no idea what to do with this info. I could really use some help with this. I know what all of the inputs and equations mean and I know how to do this on my own with paper, but I don't know how I would program this. I'd really appreciate any help on this subject.

Without knowing programming you won't be able to write that program. go to
http://www.cprogramming.com/ to learn C/C++

This is what I have so far, it is pretty bad. It won't even compile. If anyone could help out with the errors, or even if I am on the right track, I would appreciate it.


The compiler is gcc, I don't know what that means, but it comes up with a lot of errors. The first of which is a parse error. What does that mean and how do I fix it? Again any help would be greatly appreciated.

Describe me more and I may write this for you in C++(not in C). Tell me what are you trying to do more(in english)

hi...

The basic structure of main function is:

Note that all the declaration should come first before you use any functions such as printf or scanf. This is the structure of the C program.
so declare your variables at the start before entering in to the program..



The general form of a variable declaration and assignment is:

type variable_name;

where type is one of the C variable types (int, float, etc.) Name is any valid variable
name.


Example:

so you should not declare like this:

You must add semicolon ; every time when you end a statement.

When you begin a curly brace { you should end with }. in your program you used an extra curly brace which is unnecessary and causes errors.

gcc is the name of the gnu C++ compiler which comes with linux...

and also note the general syntax of printf and scanf statements:
where
format:
Format control.
argument:
Optional arguments.
Return Value
Returns the number of characters successfully printed or successfully converted and assigned respectively, or a negative value if an error occurs.

Some examples of scanf and printf are:

and you need return statements only when you use functions(which you may learn later in the course)... so your return statements at the end is unnecessary and you can remove it..

And again, dont forget to insert semicolon at the end of each statement..

i hope this should help you to fix your errors...
bye,
Paramesh

i would strongly advice you to at least start learning basic input and output function first, instead of jumping STRAIGHT into solving programming questions =) step by step towards excellence.

Also realise that most compilers would change the color of keywords when you are coding, so you wont mix up keywords with variables.

Please.....

Around here we don't "write this for you". The poster does not learn that way. If he want's it written for him, he can hire a programmer. We help him solve it by giving suggestions and maybe a code snippet or two after he's posted his attempt at a solution.

Doen't matter. By writting this program I don't want to waste my t-t-time.

And yes by using float in mathematical code you will get more accurate reasult than using int. You can use double too.