Question

Using C++

1. Create a while loop that counts even numbers from 2 to 10 2. Create a for loop that counts by five (i.e. 0, 5, 10, ...) from 0 to 100 3. Ask for a person's age and give them three tries to give you a correct age (between 0 and 100) 4. Use a for loop to list Celsius and Fahrenheit temperatures. The "C" should be from -20 to 20 and the F should be shown correspondingly (F = (9/5)*C+32). 5. The Fibonacci numbers are 1,1,2,3,5,8,13,21, etc. Use a for loop to list the first 20 Fibonacci numbers 6. Create a triangle using 2 for loops and the "*". 7. Check if a number is prime. 8. Output a list of numbers from 100 to 1 (using a for loop) to a file 9. Use a loop to output all the squares (i.e. 1,4, 9, 16, etc) to a file 10. Take a number such as 47321 and output it backwards to get 12374

Answer 1

//1 program
#include <iostream>
using namespace std;

int main()
{
int i=2,c=0;;
while(i<=10)
{
if(i%2==0)
c++;

i++;
}
cout<<"Total even no. form 2 to 10 :"<<c;
return 0;
}

//2 program
#include <iostream>
using namespace std;

int main()
{
int i=0,c=0;;
while(i<=10)
{
if(i%5==0)
c++;

i++;
}
cout<<"Total multiple of 5 form 0 to 100 :"<<c;
return 0;
}

#include <iostream>
using namespace std;

int main()
{
int age,i=0;
do{
if(i>2)
break;
cout<<"Enter the age:" ;
cin>>age;
i++;
  
  
  
}while(age<=0 || age>=100);
  
}

#include <iostream>
using namespace std;

int main()
{
int c;
float f;
for(c=-20 ;c<=20;c++)
{
f=(9.0/5.0)*c+32;
cout<<f<<endl;
}
  
}