exponents are LAAAME

I'm having trouble writing exponents. I know initially how you're supposed to define a variable and use the pow() func. but my scenario is a bit different and I need to compile and email this by tonight


x = pow(4,6);
something like this, where it's showing 4 to the 6th power. as i said before, my case is a little worse.
when I (try to) compile it, it says "invalid operands to binary ^" then there's a whole LIST of all the variables I put in. "invalid suffix "z" on integer constant
"invalid suffix "x" onasaifasfjaklsjgkasjg.. and so on.

Code:

#include <stdio.h>
#include <math.h>

main()
{
int p1;
int p2;
int p3;
int p4;
int p5;
	printf("Directions:\n");
	printf("Simplify the monomials.\n");
	printf("Write out exponents using the "^" key.\n");
	printf("12p^5 = 12 times p to the 5th power\n"); /* this is a thing I did for my math teacher for extra credit basically*/


/*--------------------------------------------------------*/
	printf("54x^3z, 36z^5x\n");
	scanf("&#37;d", &p1);
if (p1 != 18z)
{ printf("Incorrect\n"); }
else
{ printf("Correct\n"); }
system("pause");
/*-----------------------------------------------------*/
	printf("74ac, 116b^3a\n");
	scanf("%d", &p2);
if (p2 != 2a)
{ printf("Incorrect\n\a"); }
else 
{ printf("Correct\n"); }
system("pause");
/*------------------------------------------------------*/

	printf("2xyz^4t^3, 14pz^2y^5\n");
	scanf("%d", &p3);
if (p3 != 2z^2y)
{ printf("Incorrect\n"); }
else
{ printf("Correct\n");}
system("pause");
/*---------------------------------------------------------*/
	printf("6y^4, 12y^2\n"); 
	scanf("%d", &p4);
if (p4 != 6y^2)
{ printf("incorrect\n\a"); }
else
{ printf("correct\n"); }
system("pause");
/*-------------------------------------------------*/
	printf("8mp^3, 20x^7p^5\n");
	scanf("%d", &p5);
if (p5 != 4p^3)
{ printf("Incorrect\a\n"); }
else
{ printf("Correct\n"); }

	printf("Thank you for playing!\n");

system("pause");

return 0;
}

And you believe that 18z is an integer, as opposed to oh, say, a string, because why?

(Also the common factor -- if that's what you're doing -- of the first pair is 18xz.)

you are forgettign that you have to explicitly code the multiplication operator, 2z isnt 2 times z its an invlid variable, you have to code 2 * z instead, and remember the order fo operations so enclose (2*z)^(2*y). Also remember than in C/C++ the ^ operator is bitwise XOR not exponent. So what you really want is pow(2 * x , 2 * y);

so you're saying for every "variable" that is an invalid variable (2x) I have to write out as pow(2*x);? or something similar

Between abachler and myself, one of us is completely horrendously wrong. I'm betting it's not me, but I would anyway. My guess is that you want the user to literally type "2z^2y" or "2yz^2" as the answer to the problem, which you would then need to compare (as a string, not an integer, naturally) to the right answer hardcoded in (which would also need to be a string, not an integer, naturally).

so I wouldn't define it as 'int', but as 'char'

Originally Posted by Sm33zy

so I wouldn't define it as 'int', but as 'char'

Closer; you need a whole bunch of chars. A char array, perhaps.

Of course, you will need to make this change throughout.

it came down to this. This is a different copy from my original file so I screwed around with it a bit. I'm sure it's obviously still full of errors so I think I'll just call it a night

Code:

#include <stdio.h>
#include <math.h>

main()
{
int p1= 18*2;
int p2=2*4;
int p3=2*z*z*y;
int p4=6*y*y;
int p5=4*p*p;
	printf("Directions:\n");
	printf("Simplify the monomials.\n");
	printf("I believe the ^ key is invalid in C\n");
	printf("plz write out your answer using parentheses.\n");
	printf("ex. 2*x instead of 2x because 2x is an invalid variable here.\n");

/*--------------------------------------------------------*/
int x;
int y;
int z;
	printf("54*x*y*2, 36*z*5*x\n");
	scanf("%d/%d/%d",&x,&y,&z);
if (p1 != 18*z)
{ printf("Incorrect\n"); }
else
{ printf("Correct\n"); }
system("pause");
/*-----------------------------------------------------*/
int a[2];
int c;
int b;

	printf("74*a*c, 116*b*3*a\n");
	scanf("%d/%d/%d",&a,&b,&c);
if (p2 != 2*4)
{ printf("Incorrect\n\a"); }
else 
{ printf("Correct\n"); }
system("pause");
/*------------------------------------------------------*/
int x[2];
int y[2];
int z[2];
int t;
	printf("2*x*y*z*4*t*3, 14*x*z*2*y*5\n");
	scanf("%d/%d/%d", &x,&z,&y);
if (p3 != 2*z*z*y)
{ printf("Incorrect\n"); }
else
{ printf("Correct\n");}
system("pause");
/*---------------------------------------------------------*/
int y;
	printf("6*y*2, 12*y*2\n"); 
	scanf("%d", &y);
if (p4 != 6*y*y)
{ printf("incorrect\n\a"); }
else
{ printf("correct\n"); }
system("pause");
/*-------------------------------------------------*/
int m;
int p;
int x;
int p;
	printf("8*m*p*3, 20*x*7*p*5\n");
	scanf("%d/%d/%d", &m,&p,&x);
if (p5 != 4*p*p)
{ printf("Incorrect\a\n"); }
else
{ printf("Correct\n"); }

	printf("Thank you for playing!\n");

system("pause");

return 0;
}

Do you even have a compiler? You don't have to guess that you have errors, a compiler will tell you that.

Your first error is on line 4, main returns int.
Next errors are on lines 8-10, you're pretending there is such thing as variables called z ,y, and p. I say 'pretending' because none of the lines before there declare any variable or constant by those names.

I would liken you're attempt at programming to someone with a hammer who knows that it can be used to put nails into wood, but lays it down prodding it with his finger waiting for those nails to jump into holes. In other words, you don't have a friggin clue what you're doing!