Question

C++ program for sum of prime numbers in a 2d array

Answer 1

#include<iostream.h>

#include<conio.h>

void main()

{

//clear the screen.

clrscr();

//declare variable type int

int a[10],i,j,f,m;

//Input the two numbers save them in arrays.

//Here for loop is used to input multiple numbers in array.

for(i=0;i<5;i++)

{

cout<<"Enter the no."<<endl;

cin>>a[i];

}

//Draw a line for good looking program.

cout<<"------------------------------------"<<endl;

cout<<"Prime numbers are "<<endl;

//Print the array.

for(i=0;i<5;i++)

{

f=0;

for(j=2;j<a[i];j++)

{

m=a[i]%j;

if(m==0)

{

f=1;

break;

}

}

if(f==0)

cout<<a[i]<<endl;

}

//get character

getch();

}

Output

Enter the number

2

Enter the number

3

Enter the number

4

Enter the number

5

Enter the number

6

————————————

Prime numbers are

2

3

5