Help with input to floating point values

[massdeletion101]

I'm making a calculator that is Supposed to calculate floating point values, but somethign goes wrong along the way (can't be sure what). It calculates intagers just fine, but when I add a decimal with an extra intager on, something funky happens. It infinitly displays a rounded number. For instance, if I type in "3+1.3", instead of displaying "4.3" once like it should, it will just display "4" line by line infinatly over the time span that I don't hit the X at the top right. Can someone perhaps tell me a solution to this? If it will help, I have the code right here:

#include <iostream>
using namespace std;
int main()    \\calculator function
{
   cout << "Press '*' to multiply two numbers (ex: 2*2 plus enter key)\n\n";      \\start of instructions
   cout << "Press '/' to divide two numbers (ex: 2/2 plus enter key)\n\n";
   cout << "Press '+' to add to two numbers (ex: 2+2 plus enter key)\n\n";
   cout << "Press '-' to subtract a number from another(ex: 2-2 plus enter key)\n\n";    \\end of instructions
   cout << "Press 'Q' or 'q' to exit\n\n";
   char character;
   while(character != 'Q')
   {  long double value;
      getline(cin, value, '*' || '/' || '+' || '-');
      cin >> character;
      long double value2;
      getline(cin, value2)
      if(character == '*')
      {  cout << value * value2 << endl;}
      if(character == '/')
      {  cout << value / value2 << endl;}
      if(character == '+')
      {  cout << value + value2;}
      if(character == '-')
      {  cout << value - value2;}
   }
   return 0;
}

[ilikepython]

I'm making a calculator that is Supposed to calculate floating point values, but somethign goes wrong along the way (can't be sure what). It calculates intagers just fine, but when I add a decimal with an extra intager on, something funky happens. It infinitly displays a rounded number. For instance, if I type in "3+1.3", instead of displaying "4.3" once like it should, it will just display "4" line by line infinatly over the time span that I don't hit the X at the top right. Can someone perhaps tell me a solution to this? If it will help, I have the code right here:

#include <iostream>
using namespace std;
int main() \\calculator function
{
cout << "Press '*' to multiply two numbers (ex: 2*2 plus enter key)\n\n"; \\start of instructions
cout << "Press '/' to divide two numbers (ex: 2/2 plus enter key)\n\n";
cout << "Press '+' to add to two numbers (ex: 2+2 plus enter key)\n\n";
cout << "Press '-' to subtract a number from another(ex: 2-2 plus enter key)\n\n"; \\end of instructions
cout << "Press 'Q' or 'q' to exit\n\n";
char character;
while(character != 'Q')
{long double value;
getline(cin, value, '*' || '/' || '+' || '-');
cin >> character;
long double value2;
getline(cin, value2)
if(character == '*')
{cout << value * value2 << endl;}
if(character == '/')
{cout << value / value2 << endl;}
if(character == '+')
{cout << value + value2;}
if(character == '-')
{cout << value - value2;}
}
return 0;
}

I'm not sure but I believe it is because you are adding(or anything else) an integer with a float. The program adds 1 and 3 (4) and then doesn't know what to do with the 0.3. You should probably make both numbers floats. Again, I'm not sure but I think that is the problem.

[massdeletion101]

I'm not sure but I believe it is because you are adding(or anything else) an integer with a float. The program adds 1 and 3 (4) and then doesn't know what to do with the 0.3. You should probably make both numbers floats. Again, I'm not sure but I think that is the problem.

Actually, I'm adding two variables of the same type. Looking at the code, both values are of type long double. I tried what you said though, despite thinking you were wrong. It still doesn't work right sadly.:( However, there is a different outcome, it just displays nothing. (but that's because I put two numbers with deimal values in them instead of just one with a whole number, I typed 1.5+1.5 and I got nothing)

[ilikepython]

Actually, I'm adding two variables of the same type. Looking at the code, both values are of type long double. I tried what you said though, despite thinking you were wrong. It still doesn't work right sadly.:( However, there is a different outcome, it just displays nothing. (but that's because I put two numbers with deimal values in them instead of just one with a whole number, I typed 1.5+1.5 and I got nothing)

Ok, I studied it and I still can't figure something. I'm really sorry I couldn't help. Maybe somebody else can.

[massdeletion101]

Ok, I studied it and I still can't figure something. I'm really sorry I couldn't help. Maybe somebody else can.

That's okay. Trying is enough. I might contact someone else about the problem.

[Ganon11]

Are you using some different getline() function than I am? I didn't know you could use getline to get double values, or even integer values. I would get the entire user input as a string and try to get the numbers and operator for that instead of what you are doing.

[weaknessforcats]

I also notice the line comments are \\ instead of // which meams this code has never compiled.