Many errors found

[sammy102093]

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

int main ()
{
	int C = 0;
	int G = 0;
	string seq = " ";
	char c = ' ';

	cout << "Enter a DNA sequence";
	cin >> sequence;

	while (seq >> c) { if(c != "A" || c ! ="T" || c! = "C" || c ! = "G")
		cout << "Not a DNA sequence";
		return 0;
	}
		if (c == "C") c++
		if (c == "G") g++
	}

{
	cout << c;
	cout << g;

	return 0;

}

and these are the errors I am getting.

Test1.cpp:9:2: error: expected ',' or ';' before 'string'
Test1.cpp:13:9: error: 'sequence' was not declared in this scope
Test1.cpp:15:9: error: 'seq' was not declared in this scope
Test1.cpp:15:28: error: ISO C++ forbids comparison between pointer and integer
Test1.cpp:15:37: error: expected ')' before '!' token
Test1.cpp:19:12: error: ISO C++ forbids comparison between pointer and integer
Test1.cpp:20:3: error: expected ';' before 'if'
Test1.cpp: At global scope:
Test1.cpp:23:1: error: expected unqualified-id before '{' token

so these are the errors that come up after I fixed the whole quotation mistake. Now I do not know what I have to do exactly.

[vlad from moscow]

I see different quotes in this statement

cout << “Enter a DNA sequence”;

[sammy102093]

so the errors are basically telling me to declare 'Enter' 'sequence' 'seq' 'A' 'Not' 'G' and 'g'. One thing I don't understand is that what I did for C is the same as what I did for G and C didn't come up as an error. And what do you mean different quotes?

Also how would I declared the rest of them? For the Enter sequence part, I just want it to display "Enter a DNA sequence", then it would take the sequence that the user would type in.

[Chervil]

If you use a word processor for editing, it may add so-called "smart quotes" where the opening quote is visually different to the closing quote. And neither of them is the same character as the standard single and double quote, " and '

When programming, use a plain text editor (or one designed for writing code, such as notepad++).

You should be able to do a global change in the text editor, to replace the non-standard characters with ordinary quotes.

[sammy102093]

that could be why since I used Open Office to do the writing before actually compiling it. So does anybody find anything wrong with the program itself besides the quotes?

[vlad from moscow]

Change at first the quotes and do not take away the time of others!