Question

C program to print all pairs of two even numbers whose sum is equal to 40. Also draw

a flowchart for the same.​

Answer 1

Answer:

Where is carbon dating method used?

Explanation:

Carbon dating is used by archeologists to date trees, plants, and animal remains; as well as human artifacts made from wood and leather; because these items are generally younger than 50,000 years.

Answer 2

Answer:

#include <stdio.h>

int main() {    

   int i,j,sum=0;

   for(i=0;i<=40;i=i+2)

   {

       for(j=0;j<=40;j=j+2)

       {

           sum=i+j;

           if(sum==40)

           printf("(%d" "," "%d)\n", i,j);

       }

   }  

   return 0;

}

Explanation:

• We first declare two variables i and j as the two even numbers and a variable sum to store the sum of i and j.
• All the three variables declared are of the integer data type.
• Next we run a pair of nested for loops.
• The outer for loop keeps track of the first even number. We start from i = 0 and go up to i = 40 by incrementing the value of i by 2 after every iteration.
• The inner for loop keeps track of the second even number. We start from i = 0 and go up to i = 40 by incrementing the value of i by 2 after every iteration.
• For every value of i, the inner for loop is run from j = 0 to 40.
• For every pair of i and j, we calculate the sum and check if it is equal to 40 or not.
• If the sum is equal to 40, the numbers are printed.
• If the sum is not equal to 40, the next pair of numbers are tested.
• Once all the possible combinations are checked, the program is terminated.

The flowchart for the given code is as follows:

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