Discussions Q&R
If Im using a loop "for in" didnt I have to declare variable? Like: words = ["hello", "world", "spam", "eggs"]
for word in words:
print(word + "!")
variable word is not declared..
1 Vote
2 Réponses
hey guys, I've been trying to work out the formula 'v=I*r'. But whenever I run the program and input values for I and r, it doesn't give the right answer.
This is the code
#include <iostream>
using namespace std;
int main() {
int i,r;
int v = i*r;
cout<<"what is the value of i?\n";
cin>>i;
cout<<"what is the value of r?\n";
cin>>r;
cout<<"voltage ="<<v<<endl;
return 0;
}
p/s: I'm new to programming
1 Vote
8 Réponses
I want to add a grades , i'm using c# if i click add it will add to c# software and php page i create also
0 Vote
1 Réponse
I too know of using continue and break statements let take a example of prime number 555643 to check it is prime are not loop sh
-1 Vote
1 Réponse
how to save html form input data to excel file using java, not showing error in net beans but not showing Data is saved in exce
0 Vote
1 Réponse
I'am using the Sublime Text 3, in this program is posible to use JS and HTML 5 together, but I don't now to use. Somebody know?
0 Vote
1 Réponse
Hey I wanna know if there is a great app to teach and make programs for Android using Android is there app like this for free??
0 Vote
1 Réponse
I use netbeans to code Java and when I started using it it said I needed jdk8 and I downloaded jdk8 but the app is not still wo
0 Vote
2 Réponses
How do i fix this code. Im trying to pull an item from a list. Have that item mean a word, and pull it by using user input
0 Vote
1 Réponse
why not this program output 7 and why it shows compiler error ???
#include<iostream>
using namespace std;
class a{
public:
int f(){cout<<3;}
int f(int a){cout<<a;}
};
class b:public a
{
public:
int f(){cout<<5;}
};
int main()
{
b obj;
obj.f(7);
}
1 Vote
3 Réponses
5th q in challenge says that we need tge ages of lions and bears. but according to the given answer they are using IN clause which means lions or crocodiles and bears or birds. so how come this? Is it a mistake?
0 Vote
4 Réponses
what is it mean that a method reaturn a value or not for example using void to not return a value what it means at deep down of it? what is the big deal ?
0 Vote
3 Réponses
When I declared a variable like public int n the compiler is showing an error stating that it is the illegal start of an expression. Why is that. I am using JDK 1.8. Please help
0 Vote
3 Réponses
#include <iostream>
using namespace std;
int sum(int a, int b=42) {
int result = a + b;
return (result);
}
int main() {
int x = 24;
int y = 36;
//calling the function with both parameters
int result = sum(x, y);
cout << result << endl;
//calling the function without b
result = sum(x);
cout << result << endl;
return 0;
}
why is da last function cout 66 and not 48 isn't it suppose to add 24+24?
1 Vote
6 Réponses
I thought that a canvas was just a container for graphics made using JavaScript. So why is it that were able to draw those filled squares, when the canvas is empty?
0 Vote
2 Réponses
m working on a projct on online polling system using java. facing a lil difficulty in d coding section. cn sm1 plz hlp me with the code
-1 Vote
2 Réponses
What code would i require if i wanted to read in external files? Into an array while using comma as a method to split the content from the file
0 Vote
2 Réponses
which of the following statements are correct for accessing x?and why?
#include <iostream>
using namespace std;
class test{
public:
int x=9;
};
int main()
{
test t;
test *p=&t;
}
select all that apply:-
a) t.x
b) p.x
c) t->x
d) p->x
1 Vote
3 RéponsesHELP when I run this program (in c language) and input the value 2 the output comes out to be 99. I'm using GNU GCC compiler.
Can anyone please explain?
0 Vote
2 Réponses
i am getting bunch of zeros as output , no result , i am using mingw as my compiler ,please find error and show me correct way t
0 Vote
1 Réponse
just asking. in C++, why do we need to define signed & unsigned integer? why don't we always use signed? it's better. we can freely assign plus and minus. so what's the catch of using unsigned?
1 Vote
2 Réponses
How to write a program using to switch print a from 0 to 49 and to print b from 50 to 64 and print c from 65 to 74 and ....
0 Vote
2 Réponses
Write a C programme that commands a user to input a random number of animal types with there characterisics and outputs it after the user is done using vectors
0 Vote
1 Réponse
What ever I learned here most of the things are not working in turbo c++ ? i.e . instead of iostrem I have to write iostream. h . why is this so?? also it is not accepting this- using namespace std;
. and also not accepting return 0; . Please help me iam really confused. Thanks :)
0 Vote
5 Réponses
using System;
namespace GoodProgrammerTest
{
class Program
{
static void Main(string[] args)
{
Console.Write("Enter Yes or No");
Console.Write(
"Do you programme every day? : ") ;
int answer = Console.ReadLine();
if (answer =="Yes")
{
Console.WriteLine(
"You will be a good programmer");
}
else
{
Console.WriteLine(
"You will not be a good programmer");
}
}
}
}
2 Votes
3 Réponses
can someone please explain why this code keeps telling me complication error instead of outputting the value of speed.
#include <iostream>
using namespace std;
class myClass {
public:
void setcarspeed (int a){
speed=a;
}
int getcarspeed(){
return speed;
}
private:
int speed;
};
int main() {
myClass obj;
obj.setcarspeed (40);
cout<<obj.getcarspeed ;
return 0;
}
2 Votes
3 Réponseswhat is the point of
setting 'speed=a' in the 4th line of this code instead if just directly using 'int speed' in the parentheses of the 'setcarspeed' (3rd line) function?
1 Vote
1 RéponseAny rule of thumb for using switch vs if-else for performance reasons? Basically like let's say if you need to use switch case if there are more than 4 conditions?
-1 Vote
2 Réponses
what will be output??
#include <iostream>
using namespace std;
int main(int a)
{
cout << a << "\n";
return 0;
}
int main(char *a)
{
cout << a << endl;
return 0;
}
int main(int a, int b)
{
cout << a << " " << b;
return 0;
}
int main()
{
main(3);
main("Subodh");
main(9, 6);
return 0;
}
if output is compilation compilation error then how can we overload "main" function in C++
0 Vote
5 Réponses
When using Scanner is there a way to display at the top of the response entry box? Currently in the Code Playground it just displays "it looks like your application needs some input" but when requesting multiple input need a way to tell what is needed.
2 Votes
2 Réponses
why this output only comes 3 and why not output 123?
#include<iostream>
using namespace std;
class A{
public:
virtual void f(){cout<<1;}
};
class B:public A{
public:
void f(){cout<<2;}
};
class C:public B{
public:
void f(){cout<<3;}
};
int main()
{
B *p=new C;
p->f();
}
0 Vote
3 RéponsesWhile prototyping friend functions in a class is it necessary to always pass the address of the object as parameter?If so why is it that we have to pass address as parameter..In programs involving compositions we never used addresses...Why is the need for address of the objects while using friend?
4 Votes
1 Réponse
can anyone explain this output?
#include <iostream>
using namespace std;
int x(int &a,int &b)
{
a=3;
b=4;
return a+b;
}
int main()
{
int a=2;
int b=7;
int c=x(a,a);
cout <<a<<endl<<b<<endl<<c;
}
output:-
4
7
8
0 Vote
2 RéponsesI don't understand how to comes following output???could anyone explain?
#include <iostream>
using namespace std;
int x(int &a,int &b)
{
a=3;
b=4;
return a+b;
}
int main()
{
int a=2;
int b=7;
int c=x(a,a);
cout <<a<<endl<<b<<endl<<c;
}
output:-
4
7
8
1 Vote
2 Réponses
what have i to do, if i want that the program always writes for example :
0+1
1+2
3+3
6+4
10+5
15+6
...
because now it just writes
1
3
6
10
15
...
and maybe if it works, can i make then
0+1=1
1+2=3
3+3=6
6+4=10
#include <iostream>
using namespace std;
int main(){
int i;
int sum = 0;
for (i = 1; i <= 100; i++){
sum = sum+i;
cout<<sum<<endl;
}
cout<<sum;
return 0;
}
1 Vote
5 Réponses
if i text 21 it stacks. program says you are a child. you are a teenager. you are adult. how can i delete this "stack".
#include <iostream>
using namespace std;
int main() {
int age;
cin>>age;
if (age>=14){
cout<<"You're a Teenager"<<endl;
}
if (age>=18){
cout<<"You're adult"<<endl;
}
if (age>=0){
cout<<"You're a Child"<<endl;
}
else{
cout<<"Are u stupid ?"<<endl;
}
return 0;
}
0 Vote
4 Réponses
so although using srand(time(0)) can be used to get truly random numbers, how truly random are they? For example, if one were to call this method at the same time (in this example, if one were to use this command at 51s) each time would the numbers generated be the same???
If so, are the numbers still truly random??
And if this theory is true, how can one generate truly random numbers that cannot repeat based on external variables (e.g., time)?
2 Votes
4 Réponses
After creating my circle using border radius it still observe it's the parent div I create the circle from thereby placing text I needed to be inside circle outside it. So how do I solve this?....... Pls someone help me out
0 Vote
2 Réponses
Python provides an inbuilt function 'print' which h automatically generates a line break when it is called, then how can we generate a pattern as :
1
2 2
3 3 3
4 4 4 4
and so on..
using while loop ???
0 Vote
2 Réponses
guys this code I wrote passed all the unittest specifications in an oop lab. but they told me that I failed a hidden test. that my code can still be improved upon. I've tried my best but I don't know how to improve the code again. please give me ideas. am I using WET in any block. any unnecessary repetitions or redundancy? this is the code below:
http://www.sololearn.com/app/python/playground/cG5UEvIEkuHd/
0 Vote
4 Réponses
Hi, I need assistance aka HELP!
I've done this calculation in various ways some of printed nothing but zeros non stop.
Using while loop calculate all numbers 1 to 1000 add numbers to sum = sum + i
int sum = 0;
// use a while loop to calculate the sum of 1 to 1000
While(int sum = 0; sum >= 1000; sum = sum + I){
System.out.println(sum);
}
0 Vote
4 Réponses
what is the size of operate? assume size of (int)=2
#include <iostream. h>
using namespace std ;
class test
{
int x_ ;
int y_;
} ;
int main() {
test t ;
court<<size of (t)<<" ;
}
-1 Vote
2 Réponses
looks like java has some cut and dried rules about capitalization...
I typed a code using ...main (string []args)...
and got an error
until I changed it to ...main (String []Args)...
pls anyone know d rules guiding character CAPITALIZATION in java... pls post, I'll appreciate.
0 Vote
2 Réponses
I recently created and saved a small program privately and now I cannot figure out how to open it to edit and run it. I am new to using this app to create and run Java programs and would like to know how to do this in order to edit and reuse my programs. How do I open a program I have privately saved?
1 Vote
2 RéponsesAujourd'hui en vedette
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0 Votes
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2 Votes
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0 Votes
HTML community, HELP!!
1 Votes
I am a super beginner
0 Votes
What's doctype htMl
2 Votes
How this program executes?
0 Votes