Why this code is sowing error?

Question

/*I want to make a program of Temperature conversion.But when I tried to run this part of my program it showed error,what is wrong
with my code of taking input? */

#include <iostream>
int main()
{
   std::cout<<"Welcome to Temperature Conversion!"<<std::endl<<"Please Select Your Conversion Type:"<<std::endl
   <<"Press 1 to convert temperature in Fahrenheit to Kelvin"<<std::endl<<"Press 2 to convert temperature in Kelvin to Celsius"
   <<std::endl<<"Press 3 to convert temperature in Fahrenheit to Celsius"<<std::endl;
   
   int temperature = 0;
   std::cin>>temperature>>std::endl;
  
  return 0;
}

Answer 1

   std::cin>>temperature>>endl;

You can't use endl in cin 
Solution:
std::cin>>temperature;
std::cout<<endl;
  
Hope this is Helpful for you

Answer 2

The issue in your code is with the std::cin statement. You should not use >> followed by std::endl when reading input with std::cin. std::endl is used to insert a newline character and flush the output stream. When reading input, you should use >> without std::endl. Here's the corrected code:

#include <iostream>

int main() {
    std::cout << "Welcome to Temperature Conversion!" << std::endl
              << "Please Select Your Conversion Type:" << std::endl
              << "Press 1 to convert temperature in Fahrenheit to Kelvin" << std::endl
              << "Press 2 to convert temperature in Kelvin to Celsius" << std::endl
              << "Press 3 to convert temperature in Fahrenheit to Celsius" << std::endl;

    int temperature = 0;
    std::cin >> temperature;

    return 0;
}

With this change, your code should work as expected, allowing the user to input a number for the temperature conversion type.

Answer 3

The isssue is with your code, to fix this error and execute it you need to replace your code with below one.

#include <iostream>

int main() {
    std::cout << "Welcome to Temperature Conversion!" << std::endl
              << "Please Select Your Conversion Type:" << std::endl
              << "Press 1 to convert temperature in Fahrenheit to Kelvin" << std::endl
              << "Press 2 to convert temperature in Kelvin to Celsius" << std::endl
              << "Press 3 to convert temperature in Fahrenheit to Celsius" << std::endl;

    int temperature = 0;
    std::cin >> temperature; // Remove >>std::endl

    return 0;
}

Thanks