NEED HELP PLEASE!!!

[camk16]

Write a program to assign to, and later output to the screen, a string representing a value. The value, in the range of [0, 9], is read, from a file. For example, a value of 4 causes the string to be assigned four.

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

int value;

int main() {

	ifstream inData;
	
	inData.open("Value.txt");

	inData >> value;

	if (value = 1) {
		cout << "one" << endl; }
	
	else if (value = 2) {
		cout << "two" << endl; }
	
	else if (value = 3) {
		cout << "three" << endl; }
	
	else if (value = 4) {
		cout << "four" << endl; }
	
	else if (value = 5) {
		cout << "five" << endl; }
	
	else if (value = 6) {
		cout << "six" << endl; }
	
	else if (value = 7) {
		cout << "seven" << endl; }
	
	else if (value = 8) {
		cout << "eight" << endl; }
	
	else (value = 9); {
		cout << "nine" << endl; }

	cout << endl;

	system("PAUSE");
	return 0;
}
  

As it is, When I've written a "4" to the file Value.txt located in the project directory, I get "fournine" printed to the screen. Why?

Also, I realize I have thus far ignored the string part of this question. I though setting it up this way first might help me better understand how to go about building the program. I didn't, hence me posting here. PLEASE, I NEED HELP.

[2UD8vCM9]

One issue is you are not checking by using =, you need to use ==

ex.

if (value == 1)

Also

else (value = '9'); {
cout << "nine" << endl; }

what is this?

Why not just do

else if (value == 9) {
cout << "nine" << endl; }

[camk16]

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

int value;

int main() {

	ifstream inData;
	
	inData.open("Value.txt");

	inData >> value;

	if (value == 1) {
		cout << "one" << endl; }
	
	else if (value == 2) {
		cout << "two" << endl; }
	
	else if (value == 3) {
		cout << "three" << endl; }
	
	else if (value == 4) {
		cout << "four" << endl; }
	
	else if (value == 5) {
		cout << "five" << endl; }
	
	else if (value == 6) {
		cout << "six" << endl; }
	
	else if (value == 7) {
		cout << "seven" << endl; }
	
	else if (value == 8) {
		cout << "eight" << endl; }
	
	else (value == 9); {
		cout << "nine" << endl; }

	cout << endl;

	system("PAUSE");
	return 0;
}

Still gives me the same problem.

As for the '9', good eye, but that was more or less a mere type-o.

Thanks for the quick reply, btw

[2UD8vCM9]

Re-read my post. You skipped the second half of it.

Your use of else is wrong.

[camk16]

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

int value;

int main() {

	ifstream inData;
	
	inData.open("Value.txt");

	inData >> value;

	if (value == 1) {
		cout << "one" << endl; }
	
	else if (value == 2) {
		cout << "two" << endl; }
	
	else if (value == 3) {
		cout << "three" << endl; }
	
	else if (value == 4) {
		cout << "four" << endl; }
	
	else if (value == 5) {
		cout << "five" << endl; }
	
	else if (value == 6) {
		cout << "six" << endl; }
	
	else if (value == 7) {
		cout << "seven" << endl; }
	
	else if (value == 8) {
		cout << "eight" << endl; }
	
	else if (value == 9); {
		cout << "nine" << endl; }

	cout << endl;

	system("PAUSE");
	return 0;

Same Difference

[camk16]

Also, if my use of "else" is wrong, why would this code work perfectly?:

// This program is inteded to assign an alphabetic value to its corresponding numeric score and write the result to a file

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

int score; // Numeric value
char grade; // Alphabetic value assigned to a given numeric value

int main() {

	cout << "Please enter a score: "; // Prompts user to enter a score
	cin >> score;

	cout << endl;

	// If-else statement for calculating a score's corresponding grade
	if (score >=80) {
		grade = 'A'; }
	else if (score >=70) {
		grade = 'B'; }
	else if (score >=60) {
		grade = 'C'; }
	else if (score >=50) {
		grade = 'D'; }
	else  {
		grade = 'F'; }

	ofstream outData;

	outData.open ("Grade.txt"); // Creates a file named "Grade.txt"
	
	outData << "The grade given for a score of " << score << " is " << grade << endl; // Writes the users grade to the file "Grade.txt"

	outData.close();

	cout << "Your corresponding grade was written to the file Grade.txt" << endl; // Informs the user where they can find their grade

	cout << endl;

	system ("PAUSE");
	return 0;

[2UD8vCM9]

YOU ARE NOT COPYING THE CODE I PASTED. IT'S NOT THE SAME DIFFERENCE. You're putting a semicolon after your condition. Your else if isn't checking anything, the code is just being executed regardless. Take out the semicolon in

else if (value == 9);

It should be

else if (value == 9)

[camk16]

Ok, my bad, you're right. That worked. Now, can you tell me why when I change it from int to string, it no longer works?

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

string value;

int main() {

	ifstream inData;
	
	inData.open("Value.txt");

	inData >> value;

	if (value == 1) {
		cout << "one" << endl; }
	
	else if (value == 2) {
		cout << "two" << endl; }
	
	else if (value == 3) {
		cout << "three" << endl; }
	
	else if (value == 4) {
		cout << "four" << endl; }
	
	else if (value == 5) {
		cout << "five" << endl; }
	
	else if (value == 6) {
		cout << "six" << endl; }
	
	else if (value == 7) {
		cout << "seven" << endl; }
	
	else if (value == 8) {
		cout << "eight" << endl; }
	
	else if (value == 9) {
		cout << "nine" << endl; }

	cout << endl;

	system("PAUSE");
	return 0;
}

[bonho]

because 1 != "1"

In fact, I'm not even sure if this compiles. Even if it does it won't execute as you expected because of the above.

If you changed it to

if (value == "1") {
  cout << "one" << endl;
} else if (value == "2") {
....
} else if (value == "9") {
  cout << "nine"<< endl;
}

Then it should work.

[camk16]

Wooooow... ok, I was at one point on the right track then, except I was using single quotes, as in:

if (value == '1') {
  cout << "one" << endl;
} else if (value == '2') {
....
} else if (value == '9') {
  cout << "nine"<< endl;
}

I remembering learning in a lecture something about strings with only one character needing 'single quotes' as opposed to a string with multiple characters using "double quotes". Clearly whatever I thought I was thinking of was wrong. Do you have any idea what my proff might actually have been referring to?

Btw, it did work. Thank you!

[2UD8vCM9]

He was referring to characters.
ex.

char a = 'a';

string name="John"; //name = John
name[0] = 'Z'; //name = Zohn 

[anup30]

#include <iostream>
using namespace std;
int main(){	
	string s[4] = {"one","two","three","four"};
	int num = 4; 
	//cin >> num;		
	cout << "the number spells: " << s[num-1] << endl;	
return 0;
}

[camk16]

Riiiight. Thanks, Pindrought.

Not sure what you've got going on there, anup30. But thanks to you, too.

[camk16]

You know, I have to admit, learning to code C++ is difficult. It's literally like learning a second language. However, learning, understanding, and executing its concepts can be quite rewarding. Thanks again, gents.

[anup30]

Not sure what you've got going on there,

This thread is to see examples of other ways to do it.

http://www.cplusplus.com/forum/beginner/156414/

so, that's a different way to solve. typing if else for every number maybe tiresome. you can make it much shorter by string s[4] = {"one","two","three","four"}; way.