Question

Make 2 hard programming (1 about pattern and 1 about anything) problem in c++ that can be solved in around 30 minute

give the problem + the answer please

i need for learning c++

Answer 1

#include <iostream>

using namespace std;

int main(){

int n, i, j, space = 1;

cout<<"Enter size: ";

cin>>n;

space = n - 1;

// prints the upper part

for (j = 1; j <= n; j++)

{

for (i = 1; i <= space; i++)

{

cout<<"*";

}

space--;

for (i = 1; i <= 2 * j - 1; i++)

{

  if(i==1 || i==2*j-i)

cout<<"*";

}

cout<<endl;

}

space = 1;

// prints the lower part

for (j = 1; j <= n - 1; j++)

{

  // prints the spaces

for (i = 1; i <= space; i++)

{

cout<<"*";

}

space++;

// prints the stars

for (i = 1; i <= 2 * (n - j) - 1; i++)

{

  if(i==1 || i==(2*n-j)-1)

cout<<"*";

}

cout<<endl;

}

}

Answer 2:

#include <iostream>

using namespace std;

int main(){

int start,end;

cout<<"Enter start and end ranges to print Prime numbers : ";

cin>>start;

cin>>end;

//iterating in range

for(int i=start;i<end;i++){

int count=0;

//checking for prime

for(int j=1;j<=i;j++){

//checking for factors

if(i%j==0){

count++;

}

}

//if factors are 2 than it is prime

if(count==2)

cout<<i<<" ";

}

}

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