Cannot implicitly convert type int to string? why? - MYCPLUS

This topic has 1 reply, 2 voices, and was last updated 16 years, 4 months ago by msaqib.

Viewing 1 reply thread

Author
Posts

July 10, 2008 at 12:21 pm #2114

Participant

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 />

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication1{

class Program{

static void Main(string[] args){

string firstn;

string secondn;

string thirdn;

int first;

int second;

int third;

string sign;

int signn;

begin:

switch (thirdn){

case 1:

Console.WriteLine("Please enter the first number:");

firstn = Console.ReadLine();

first = int.Parse(firstn);

Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");

sign = Console.ReadLine();

signn = Int32.Parse(sign);

Console.WriteLine("Please enter the number to add with " + first);

secondn = Console.ReadLine();

second = int.Parse(secondn);

third = first + second;

Console.WriteLine(third);

Console.Read();

break;

case 2:

Console.WriteLine("Please enter the first number:");

firstn = Console.ReadLine();

first = Int32.Parse(firstn);

Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");

sign = Console.ReadLine();

Console.WriteLine("Please enter the second number to subtract with " + first);

secondn = Console.ReadLine();

second = Int32.Parse(secondn);

third = first - second;

Console.WriteLine(third);

Console.Read();

break;

case 3:

Console.WriteLine("Please enter the first number:");

firstn = Console.ReadLine();

first = Int32.Parse(firstn);

Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");

sign = Console.ReadLine();

Console.WriteLine("Please enter the second number to multiply with " + first);

secondn = Console.ReadLine();

second = Int32.Parse(secondn);

third = first * second;

Console.WriteLine(third);

Console.Read();

break;

case 4:

Console.WriteLine("Please enter the first number:");

firstn = Console.ReadLine();

first = Int32.Parse(firstn);

Console.WriteLine("Please enter if you would like to Add, subtract, multiply, or divide?");

sign = Console.ReadLine();

Console.WriteLine("Please enter the second number to divide with " + first);

secondn = Console.ReadLine();

second = Int32.Parse(secondn);

third = first / second;

Console.WriteLine(third);

Console.Read();

break;

default:

Console.WriteLine("Please enter a number");

}

decide:

Console.Write("Type "continue" to go on or "quit" to stop: ");

firstn = Console.ReadLine();

// switch with string type

switch (firstn){

case "continue":

goto begin;

case "quit":

Console.WriteLine("Good Bye");

Console.Read();

break;

default:

Console.WriteLine("Your input {0} is incorrect.", firstn);

goto decide;

}

July 10, 2008 at 2:11 pm #3405
msaqib
Participant
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; switch (thirdn){ case 1: //code case 2: //code }
1
2
3
4
5
6
7
string thirdn; 
switch (thirdn){ 
case 1: 
//code 
case 2: 
//code 
}
Now the problem is you can not use string type variable in switch statement. You could use it like
 string thirdn; switch (thirdn){ case "1": //code case "2": //code }
1
2
3
4
5
6
7
8
 
string thirdn; 
switch (thirdn){ 
case "1": 
//code 
case "2": 
//code 
}
Or you could have use int type variable like
 int thirdn; switch (thirdn){ case 1: //code case 2: //code }
1
2
3
4
5
6
7
8
 
int thirdn; 
switch (thirdn){ 
case 1: 
//code 
case 2: 
//code 
}

Author
Posts

Viewing 1 reply thread

The forum ‘C# Programming’ is closed to new topics and replies.