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german
4 years ago
13

Write a program in C++ to swap two variables usingfunctions?

Computers and Technology
1 answer:
lilavasa [31]4 years ago
8 0

Answer:

#include <iostream>

using namespace std;

void swap(int& m, int& n)  /* passing by reference so that changes will be made in the original values.*/

{

   int t=m;

   m=n;

   n=t;

}

int main()

{

   int val1,val2;

   cout<<"Enter the values"<<endl;

   cin>>val1>>val2;

   cout<<"Values before swap "<<val1<<" "<<val2<<endl;

   swap(val1,val2); //calling the function swap..

   cout<<"Values after swap "<<val1<<" "<<val2<<endl;

return 0;

}

Explanation:

Created a function swap with 2 arguments m and n passed by reference.

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Find every number from 1 to n (inclusive) that is a palindrome which starts with the digit 3. Do not user a helper function.
Mkey [24]

Answer: Following code is in python

n=input()

num='1'

while int(num)<=int(n):    //loop from 1 to n

   flag=1   //if an unequal element will be found it will be 0

   l=len(num)

   if num[0]=='3':

       j=0

       k=l-1

       while j<k:    //loop till middle of number

           if num[j]==num[k]:

               j+=1     //from beginning

               k-=1    //from end

           else:

               flag=0

               break

       if flag==1:

           print(int(num))

   num=str(int(num)+1)    //number will be incremented as integer

INPUT :

1000

OUTPUT :

3

33

303

313

323

333

343

353

363

373

383

393

Explanation:

In the above code, a loop is executed till num is equal to n which is entered by the user. num is treated as a string so that to ease the process of checking first character is 3 or not. If it is 3 then another loop executes which checks if an element from starting is equal to the corresponding element from the end. If an element is not equal then the flag is changed and then we break out of the loop and prints the number if the flag isn't changed.

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Why is my speedtest is very good but chrome is slow
olga55 [171]
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5 0
3 years ago
Write a program in python to test if given number is prime or not.
Paraphin [41]

Answer:

Answer:

def main():

num = int(input("Input a number to check for prime: "))

if num > 1:

 for i in range(2,num):

  if (num % i) == 0:

   print("%d is not a prime number" % num)

   break

  else:

   print("%d is a prime number" % num)

   break

else:

 print("%d is not a prime number" % num)

 

if __name__ == "__main__":

main()

Explanation:

Solution retrieved from programiz.com.

Note, this program uses the idea of the Sieve of Eratosthenes to validate the input number by using the modulo operator to determine primeness.

The program will output to the user if the number input is indeed prime or not.

Cheers.

Explanation:

4 0
3 years ago
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Hey should I get a r()blox gift card if so what amount 5 dollars 10 or 100
IRINA_888 [86]

Answer:

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What is the value of 8n when n= = 2?​
lidiya [134]

Answer:

The value of 8n would be 16

8n

8(2)= 16

(uhh this is a math question right? Sorry if it has to deal with tech)

6 0
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