The following is an attempt to display a table of Celsius temperatures and their Fahrenheit equivalents in the range 0 to 20. int celsius;
for ( celsius = 0; celsius <= 20; celsius =+ 1 );
{
double f = 9 / 5 * celsius + 32;
cout << celsius << " C == "
<< f << " Fahrenhiet "
<< endl;
}

Although this code compiles without complaint, it has more than one mistake. Pick the answer that correctly identifies a mistake with the use of the C++ iteration statement.

A. The double variable f must be declared prior to the for loop.
B.
The correct for loop header for this iteration is,
for ( celsius = 0; celsius < 20; celsius =+ 1 )
C.
Remove the semicolon from the line with the for loop header.
D.
The statement that computes the equivalent temperature in Fahrenheit is wrong. It should be the following,

double f = 9.0 / 5.0 * celsius + 32;

The corrected code is as follows:

using System;

using static System.Console;

class DebugTwo2{

     static void Main(string[] args){

       string name;string firstString, secondString;

       int first, second, product;

       Write("Enter your name >> ");

       name = ReadLine();

       Write("Hello, {0}! Enter an integer >> ", name);

       firstString = ReadLine();

       first = Convert.ToInt32(firstString);

       Write("Enter another integer >> ");

       secondString = ReadLine();

       second = Convert.ToInt32(secondString);

       product = first * second;

       Write("Thank you, {0}. The product of {1} and {2} is {3}", name,first, second, product);

   }

}

Explanation:

       string name;string firstString, secondString; Replace secondSting with secondString,

       int first, second, product;

       Write("Enter your name >> "); --- Here, the quotes must be closed with corresponding quotes "

       name = ReadLine(); The syntax of readLine is incorrect without the () brackets

       Write("Hello, {0}! Enter an integer >> ", name);

       firstString = ReadLine();

       first = Convert.ToInt32(firstString); There is a dot between Convert and ToInt32

       Write("Enter another integer >> ");

       secondString = ReadLine(); --- Readline() should be written as ReadLine()

       second = Convert.ToInt32(secondString);

       product = first * second;

       Write("Thank you, {0}. The product of {1} and {2} is {3}", name,first, second, product); --- The formats in {} should start from 0 because 0 has already been initialized for variable name

   }

}