please help, i'm really stuck

I know this is a mess... I got parts of it to work (the square part) but when I add in triangle...I get lots of errors

Code:

#include <iostream>
#include <string>
#include <cstdlib>

using namespace std;

void instructions();	//Instructions to the user.
void calculations();	//Calculates the area of a triangle or square.

int main ()
{
// Instructions for the user.
	instructions();

// Calculates the area.
	calculations();

return 0;
}
// Instructions.
	void instructions()
{	
	cout << "This program calculates the area of "
		 << "either a square or a triangle.  You will" << endl;
	cout << "first be asked to enter a letter " 
		 << "(s for square, or t for triangle) to identify" << endl;
	cout << "which kind of figure you want the area computed for.  "
		 << "Be sure to type a " << endl;
	cout << "lower-case letter, and not a capital letter.  "
		 << "Then you will be asked for " << endl;
	cout << "dimensions of the figure.  Always hit the <Enter> "
		 << "key after typing whatever " << endl;
	cout << "has been asked for." << endl << endl;

}  // End instructions.




	// Calculations.
	void calculations()
	
{
	int squ1, tri1;
	char let1; 
	float areas;  
	float areat;

cout << "Type the letter s to compute the area of a square, "
		 << "or type t for a triangle: ";
	cin >> let1;

	if (let1=='s'){
		cout << "Enter the length of a side for the square: ";
		cin >> squ1;
		if (squ1 > 0)
		{//Calculates the area of a square
		areas = (squ1 * squ1);
		cout << "The area of a square with a side of " << squ1 
			 << " is " << areas << endl;}
			else (squ1 <= 0)
			{cout << "It is impossible to have a square with a side 
				  << "whose length is " << squ1 << endl;}

	else 
		if (let1=='t'){
		cout << "Enter the length of the base for the triangle: ";
		cin >> tri1;

		//Calculates the area of a triangle
		areat = (.5 * tri1 * tri1); 
		cout << "The area of a triangle with a base of " << tri1 
			 << " and a height of " << tri1 << " is " << areat << endl;
		}
		else {
			cout << "This program can only recognize the "
				 << "lower-case letters s and t.  Sorry." << endl;
	
	
	}

	return;
}	// End calculations.

Some pieces of advice:
1. Indent your code properly!
2. Stop placing your brackets like that, choose a style ans stick to it, don't use several different ones at the same time.
3. Skip some lines to make your code clearer.
4. Align your statements to a certain column.
5. Put spaces between an operator and its operands.

So, here the code, a if was missing after an else and before the conditionnal statement. And, you forgot to place a closing bracket somewhere. (but, well, if you didn't use such a messy style...)

Code:

#include <iostream>
#include <string>
#include <cstdlib>

using namespace std;

static void instructions();	//Instructions to the user.
static void calculations();	//Calculates the area of a triangle or square.

int main ()
{
	instructions();

	calculations();

    return 0;
}

void instructions()
{	
	cout << "This program calculates the area of "
		 << "either a square or a triangle.  You will" << endl;
	cout << "first be asked to enter a letter "
		 << "(s for square, or t for triangle) to identify" << endl;
	cout << "which kind of figure you want the area computed for.  "
		 << "Be sure to type a " << endl;
	cout << "lower-case letter, and not a capital letter.  "
		 << "Then you will be asked for " << endl;
	cout << "dimensions of the figure.  Always hit the <Enter> "
		 << "key after typing whatever " << endl;
	cout << "has been asked for." << endl << endl;

}

void calculations()	
{
	int   squ1, tri1;
	char  let1;

	float areas;
	float areat;

    cout << "Type the letter s to compute the area of a square, "
		 << "or type t for a triangle: ";
	cin  >> let1;

	if (let1 == 's') {
		cout << "Enter the length of a side for the square: ";
		cin  >> squ1;

		if (squ1 > 0) {
		    areas = (squ1 * squ1);

		    cout << "The area of a square with a side of " << squ1
			     << " is " << areas << endl;
        } else if (squ1 <= 0)
            cout << "It is impossible to have a square with a side "
				 << "whose length is " << squ1 << endl;
    } else if (let1 == 't') {
		cout << "Enter the length of the base for the triangle: ";
		cin  >> tri1;

		areat = (.5 * tri1 * tri1);

		cout << "The area of a triangle with a base of " << tri1
			 << " and a height of " << tri1 << " is " << areat << endl;
	} else
	    cout << "This program can only recognize the "
			 << "lower-case letters s and t.  Sorry." << endl;

	return;
}

[edit]My indentation is bad because the original code used tabs instead of spaces.

Thanks!! Actually I did get it cleaned up and it works now. I just need some help adjusting the spaces. It comes out with spaces between each line, but I need to have the code display without spaces. (I hope that made sense)

Code:

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;

void instructions();	//Instructions to the user.
void calculations();	//Calculates the area of a triangle or square.

int main ()
{
// Instructions for the user.
	instructions();

	// Calculates the area.
	calculations();

	calculations();

	calculations();

	calculations();

	calculations();

	calculations();

	calculations();

	calculations();


	return 0;
}

-----------------------------------------------------------
// Instructions.
	void instructions()
{	
	cout << "This program calculates the area of "
		 << "either a square or a triangle.  You will" << endl;
	cout << "first be asked to enter a letter " 
		 << "(s for square, or t for triangle) to identify" << endl;
	cout << "which kind of figure you want the area computed for.  "
		 << "Be sure to type a " << endl;
	cout << "lower-case letter, and not a capital letter.  "
		 << "Then you will be asked for " << endl;
	cout << "dimensions of the figure.  Always hit the <Enter> "
		 << "key after typing whatever " << endl;
	cout << "has been asked for." << endl << endl;

}  // End instructions.

-------------------------------------------------------------------

// Calculations.
	void calculations()
{
	int squ1, tri1, tri2, area;
	char let1;  	

	cout << "Type the letter s to compute the area of a square, "
		 << "or type t for a triangle: ";
	cin >> let1;
	cout << endl;	
	if (let1 == 's')
	{		cout << "Enter the length of a side for the square: ";
			cin >> squ1;

			if (squ1 <=0)	//sanity check
			{
				cout << "It is impossible to have a square with "
					 << "a side of "
					 << squ1
					 << endl << endl;
			}

			else
			{
				cout << endl;
				area = squ1 * squ1;	//calculate area 
				cout << "The area of a square with a side of "
					 << squ1
					 << " is "
					 << area 
					 << endl << endl;
			}


	}

	else if (let1 == 't')
	{
			cout << "Enter the length of the base for the triangle: ";
			cin >> tri1;
			cout << endl;

			if (tri1 <=0)	//sanity check
			{
				cout << "It is impossible to have a triangle with a "
					 << "base whose length is "
					 << tri1
					 << endl << endl;
			}

			else
			{
				cout << "Enter the height of the triangle: ";
				cin >> tri2;
				cout << endl <<endl;

				if (tri2 <=0) //sanity check
				{
					cout << "It is imppossible to have a triangle with a "
						 << "height of " 
						 << tri2
						 << endl << endl;
				}

				else
				{

				area = tri1 * tri2 / 2;	//calculate area

				cout << "The area of a triangle with a base of "
					 << tri1
					 << " and a height of "
					 << tri2
					 << " is "
			 		 << area 
					 << endl << endl;
				}
			}
		}
	else 
	{
			cout << "This program can only recognize the "
				 << "lower-case letters s and t.  Sorry." << endl <<endl;
	}
	
	
	

	return;
}	// End calculations.

I didn't get it... about your space thing, are you talking about the screen display, the forum code display or your code itself?

I don't know the right terminology, but here's how it displays when the program is executed:

******************************************

Type the letter s to compute the area of a square, or type t for a triangle: s

Enter the length of a side for the square: 3
The area of a square with a side of 3 is 9

Type the letter s to compute the area of a square, or type t for a triangle: t

Enter the length of the base for the triangle: 4

Enter the height of the triangle: 6


The area of a triangle with a base of 4 and a height of 6 is 12

Type the letter s to compute the area of a square, or type t for a triangle:

******************************
I'd like to keep the spaces only between each new "Type the letter s to compute...." and delete the ones in between so it looks like

space
Enter the length of the base:
Enter the height:
The area of a triangle is:
space

Well, I think you're able to do it by yourself, really and without much efforts, so I'll let you do it; just remove the endl where you do'nt wnat a space.