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Double variable input


Double variable input

By : Mohammad abbaszadeh
Date : November 21 2020, 09:01 AM
To fix this issue Besides the error in trying to do the math before you have your numbers, you also need to declare your variables inside your main method or make your variables static.
code :
    public static void main(String[] args) {
        double a,b,c,d;  //These don't have to be static, if they are inside your method. 
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter your numbers ");
        a = sc.nextDouble();
        b = sc.nextDouble();
        c = sc.nextDouble();
        d = sc.nextDouble();
        double e = (a+b+c+d)/4;  //Do math after we save the numbers
        System.out.println(e);
    }
    static double a,b,c,d;  //If you leave these outside your method, it has to be static
    static Scanner sc = new Scanner(System.in); //This as well

    public static void main(String[] args) {

        System.out.println("Enter your numbers ");
        a = sc.nextDouble();
        b = sc.nextDouble();
        c = sc.nextDouble();
        d = sc.nextDouble();
        double e = (a+b+c+d)/4; //Do math after we save the numbers
        System.out.println(e);

    }
public class Solution
{
    public static void main(String[] args) {
        //You can call static methods from another static method without an instance of the class. 
        //So you can do this if it is static. Notice I did not create an instance of Example. 
        Example.staticMethod();
        System.out.println(Example.staticVariable);
        //However these will NOT compile
        //Example.nonStaticMethod
        //System.out.println(Example.nonStaticVariable);

        //If you want access to the nonStaticMethod you need an instance. 
        Example myExample = new Example();
        myExample.nonStaticMethod();  //This WILL compile. 
        System.out.println(myExample.nonStaticVariable); //Will compile
    }
}

class Example{
    static String staticVariable = "";
    public String nonStaticVariable = "";
    public static void staticMethod(){
    }
    public void nonStaticMethod(){
    }
}


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Parsing .txt file for double variable input in C++

Parsing .txt file for double variable input in C++


By : user3014782
Date : March 29 2020, 07:55 AM
I wish this help you Currently working on a snippet to input variables in which a user changes a text file to be used later. Storing these in an array, and later referencing them for some openGL. , To apply what NattyBumppo had to say just change:
code :
n[i]=strtod(strtok(buf, ";"), NULL);
strtok(buf," =");
n[i] = strtod(strtok(NULL, " ;"), NULL);
delete buf;
ifstream input;
input.open("temp.txt", ios::in);
if( !input.good() )
    cout << "input not opened successfully";

while( !input.eof() )
{
    double n = -1;
    while( input.get() != '=' && !input.eof() );

    input >> n;
    if( input.good() )
        cout << n << endl;
    else
        input.clear();

    while( input.get() != '\n' && !input.eof() );
}
C : how is double number (e.g. 123.45) stored in a float variable or double variable or long double variable?

C : how is double number (e.g. 123.45) stored in a float variable or double variable or long double variable?


By : Narak
Date : March 29 2020, 07:55 AM
this will help See Wikipedia: http://en.wikipedia.org/wiki/Single_precision_floating-point_format, which describes single precision floating point (a typical C float, but depends on the compiler) as a 1-bit sign, 8-bit biased exponent, and 24-bit mantissa (23-bits stored).
For your example:
How to use the function that expects RDD[(Double, Double)] as an input for a case of Seq[Seq[(Double, Double)]]?

How to use the function that expects RDD[(Double, Double)] as an input for a case of Seq[Seq[(Double, Double)]]?


By : Mikey
Date : March 29 2020, 07:55 AM
hope this fix your issue RDD is Apache Spark's abstraction for a Distributed Resilient Dataset
To create an RDD you'll need an instance of SparkContext, which can be thought of as a "connection" or "handle" to a cluster running Apache Spark.
code :
val sc: SparkContext = ???
val output: Seq[Seq[(Double, Double)]] = ???

val rdd: RDD[(Double, Double)] = sc.parallelize(output.flatten)
Bad input to double variable

Bad input to double variable


By : pedram b
Date : March 29 2020, 07:55 AM
wish of those help You try and use a before validating whether the input is valid. This could lead to unexpected behavior. You need to validate your input, something like:
code :
if (scanf("%lf %lf", &a, &b) != 2) {
    // handle bad input
}
how to take entire line as input to a string variable after taking a double as input?

how to take entire line as input to a string variable after taking a double as input?


By : Franco Pauselli
Date : March 29 2020, 07:55 AM
will help you aim: write a program in c++ , First change s to
code :
s = "hello and welcome"
#include <strtk.hpp>

double sum = d + b ; // adding doubles 

std::string sum_as_string = strtk::type_to_string<double>(sum); //converted sum to string

std::string final_string = sum_as_string + s2 + s;//concatenate your input string to sum string  and s string
 cout<<final_string<<"\n";
int p;
double q;
string s2,result;

// Declare second integer, double, and String variables.

// Read and save an integer, double, and String to your variables.
cin>>p;
cin>>q;
getline(cin >> ws ,s2);

// Note: If you have trouble reading the entire string, please go back and review the Tutorial closely.

// Print the sum of both integer variables on a new line.
cout<<p+i<<"\n";


// Print the sum of the double variables on a new line.
std::cout << std::fixed;
std::cout << std::setprecision(1);
cout<<q+d<<"\n";
// Concatenate and print the String variables on a new line
result = s + s2;
cout<<result<<"\n";
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