Cannot implicitly convert type int to string? why?

[CRavi]

Hello i am still new to C#, has been a month now studying this from VS 2008 C# but now i am concentrating more on code than gui interface, i am looking right now if and else and switch, i decied to use a switch since it is new to me, it keeps giving me that error “implicitly convert type into string, for all 4 cases i made, why? all of the code is below:

<br /> using System;<br /> using System.Collections.Generic;<br /> using System.Linq;<br /> using System.Text;<br /> <br /> namespace ConsoleApplication1{<br /> class Program{<br /> <br /> static void Main(string[] args){<br /> string firstn;<br /> string secondn;<br /> string thirdn;<br /> int first;<br /> int second;<br /> int third;<br /> string sign;<br /> int signn;<br /> begin:<br /> switch (thirdn){<br /> case 1:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = int.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> signn = Int32.Parse(sign);<br /> Console.WriteLine("Please enter the number to add with " + first);<br /> secondn = Console.ReadLine();<br /> second = int.Parse(secondn);<br /> third = first + second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> case 2:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = Int32.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> Console.WriteLine("Please enter the second number to subtract with " + first);<br /> secondn = Console.ReadLine();<br /> second = Int32.Parse(secondn);<br /> third = first - second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> case 3:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = Int32.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> Console.WriteLine("Please enter the second number to multiply with " + first);<br /> secondn = Console.ReadLine();<br /> second = Int32.Parse(secondn);<br /> third = first * second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> case 4:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = Int32.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> Console.WriteLine("Please enter the second number to divide with " + first);<br /> secondn = Console.ReadLine();<br /> second = Int32.Parse(secondn);<br /> third = first / second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> default:<br /> Console.WriteLine("Please enter a number");<br /> }<br /> <br /> decide:<br /> Console.Write("Type "continue" to go on or "quit" to stop: ");<br /> <br /> firstn = Console.ReadLine();<br /> <br /> // switch with string type<br /> <br /> switch (firstn){<br /> <br /> case "continue":<br /> goto begin;<br /> case "quit":<br /> Console.WriteLine("Good Bye");<br /> Console.Read();<br /> break;<br /> default:<br /> Console.WriteLine("Your input {0} is incorrect.", firstn);<br /> goto decide;<br /> <br /> }<br />

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<br /> using System;<br /> using System.Collections.Generic;<br /> using System.Linq;<br /> using System.Text;<br /> <br /> namespace ConsoleApplication1{<br /> class Program{<br /> <br /> static void Main(string[] args){<br /> string firstn;<br /> string secondn;<br /> string thirdn;<br /> int first;<br /> int second;<br /> int third;<br /> string sign;<br /> int signn;<br /> begin:<br /> switch (thirdn){<br /> case 1:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = int.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> signn = Int32.Parse(sign);<br /> Console.WriteLine("Please enter the number to add with " + first);<br /> secondn = Console.ReadLine();<br /> second = int.Parse(secondn);<br /> third = first + second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> case 2:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = Int32.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> Console.WriteLine("Please enter the second number to subtract with " + first);<br /> secondn = Console.ReadLine();<br /> second = Int32.Parse(secondn);<br /> third = first - second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> case 3:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = Int32.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> Console.WriteLine("Please enter the second number to multiply with " + first);<br /> secondn = Console.ReadLine();<br /> second = Int32.Parse(secondn);<br /> third = first * second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> case 4:<br /> Console.WriteLine("Please enter the first number:");<br /> firstn = Console.ReadLine();<br /> first = Int32.Parse(firstn);<br /> Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");<br /> sign = Console.ReadLine();<br /> Console.WriteLine("Please enter the second number to divide with " + first);<br /> secondn = Console.ReadLine();<br /> second = Int32.Parse(secondn);<br /> third = first / second;<br /> Console.WriteLine(third);<br /> Console.Read();<br /> break;<br /> default:<br /> Console.WriteLine("Please enter a number");<br /> }<br /> <br /> decide:<br /> Console.Write("Type "continue" to go on or "quit" to stop: ");<br /> <br /> firstn = Console.ReadLine();<br /> <br /> // switch with string type<br /> <br /> switch (firstn){<br /> <br /> case "continue":<br /> goto begin;<br /> case "quit":<br /> Console.WriteLine("Good Bye");<br /> Console.Read();<br /> break;<br /> default:<br /> Console.WriteLine("Your input {0} is incorrect.", firstn);<br /> goto decide;<br /> <br /> }<br />

[msaqib]

HelloYou are trying to use string type variable in your switch statement which is expecting an int type variable. Here is how you are doing

string thirdn;<br /> switch (thirdn){<br /> case 1:<br /> //code<br /> case 2:<br /> //code<br /> }

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string thirdn;<br /> switch (thirdn){<br /> case 1:<br /> //code<br /> case 2:<br /> //code<br /> }

Now the problem is you can not use string type variable in switch statement. You could use it like

<br /> string thirdn;<br /> switch (thirdn){<br /> case "1":<br /> //code<br /> case "2":<br /> //code<br /> }

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<br /> string thirdn;<br /> switch (thirdn){<br /> case "1":<br /> //code<br /> case "2":<br /> //code<br /> }

Or you could have use int type variable like

<br /> int thirdn;<br /> switch (thirdn){<br /> case 1:<br /> //code<br /> case 2:<br /> //code<br /> }

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<br /> int thirdn;<br /> switch (thirdn){<br /> case 1:<br /> //code<br /> case 2:<br /> //code<br /> }

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