[RESOLVED] C++ For loop problem - Overclock.net

NameUnknown · 10-14-09

Code:

int main ()
{

	int Even = 0;
	int Odd = -1;
	int Breakout = 101;
	int OddTotal = Odd;

	cout << "This program will add the odd numbers between 0 & 100." << endl;

	for Odd < 101
		
		Odd = Odd + 2;
		Even = Even + 2;
		OddTotal = OddTotal + Odd;

		cout << "The current total of the odd numbers is " << OddTotal << "." << endl;
		cout << endl;
		

system("PAUSE");
}

the program above is adding all the odd numbers 0-100. the problem I have is that no matter how I setup the loop, it gives me an error saying:

Error 1 error C2061: syntax error : identifier 'Odd'

the error is referring to the int Odd that is in the For line.
I cant find anyway to get this to go away or to compile right, any help would be nice.

NameUnknown · 10-14-09

Oh and ive put the Odd < 101 in parenthesis, ive had it use the Breakout integer as well and it still fails, if I have parenthesis on there it gives me errors calling for semi colons before and after also.

DuckieHo · 10-14-09

Curly Brackets.

You can make the code simplier using Odd++ and the modulus function.

nathris · 10-14-09

I'm guessing you used to program a lot in python?

"for Odd < 101" is not even close to C++ syntax.

What you're looking for is

while(Odd<101)
{

//the other code goes BETWEEN curly braces

}

NameUnknown · 10-14-09

no need for a modulus just getting the sum of the odd numbers, which is why i cant really use Odd++, and just personal taste but I was never a fan of ___++ to add a variable to itself, I prefer seeing all the math laid out like it would be if it were written on paper.

dham · 10-14-09

woa

its def

for(int a = 0; a < 10; a++) {

}

or

int a = 0;

while(a < 10) {

a++;
}

essentially the same thing

NameUnknown · 10-14-09

Quote:

Originally Posted by nathris

I'm guessing you used to program a lot in python?

"for Odd < 101" is not even close to C++ syntax.

What you're looking for is

while(Odd<101)
{

//the other code goes BETWEEN curly braces

}

never did python. Did C++, Java, Visual basic, and Assembly. I constantly mix up my languages as well. but the assignment was...

Quote:

2. Write a program with a for statement that computes the sum of the odd integers in the range 0 to 100 inclusive and displays the sum. Think about how to determine an odd integer first. Turn in your .cpp file.

Which is why I was doing For (Odd < 101)

Sepiida · 10-14-09

if you want to use a for loop you might try something like this
int sum=0;
for(int i=1;i<101;i += 2){
sum += i;
}

this will take i through all the odd numbers from 0-100, your current format would work with a while loop.

DuckieHo · 10-14-09

Quote:

Originally Posted by NameUnknown

no need for a modulus just getting the sum of the odd numbers, which is why i cant really use Odd++, and just personal taste but I was never a fan of ___++ to add a variable to itself, I prefer seeing all the math laid out like it would be if it were written on paper.

You can use modulus to check if odd number and then make the program more flexible.

Also, why waste time when there are typing shortcuts?

Also, Odd++ runs faster than Odd = Odd + 1.

(Unfortunately, I haven't touched C++ in a few years but I understand good programming habits.

)

nathris · 10-14-09

Quote:

Originally Posted by NameUnknown

no need for a modulus just getting the sum of the odd numbers, which is why i cant really use Odd++, and just personal taste but I was never a fan of ___++ to add a variable to itself, I prefer seeing all the math laid out like it would be if it were written on paper.

What he was saying is it would be easier.

Code:

#include <iostream>

int main*(
{int i,total = 0;
while(i<100)
{if (i++%2 == 1) total += i;
cout << "Current total: " << i << endl;
}
}

That does the same thing I believe.

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[RESOLVED] C++ For loop problem

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