# Sum of Two Prime Numbers – C++ program

Write a program in C++ to Check Whether a Number can be Express as a Sum of Two Prime Numbers.

## Prime Number Program for Positive Numbers

This is the prime Number Program for Positive Numbers, if the user enter a negative number then the program asks the user, again and again, to enter the positive number, until the user enters the positive number.

Output

## C++ program of Sum of Two Prime Numbers

Output

Enter a +ve Integer: 4

4 = 3+1

## Excercise

Find the possible mistakes in the followingÂ Shamilâ€™s Flow Table of the program ofÂ  Sum of Two Prime Numbers in C++.

 Loop 1 Loop 2 Loop Â 3 If 1 if 2 if 3 If 4 What line will execute 1 time i=3; j=2 j=2 j=3; j=4 j=5 j=6 Â False false True False 1,2,3,4,5,6,7,8,9,10,11,12, 13,14,15,16,17, 22,23,24,25,30,31,32,(23,24,25, 26,27,28,29,30,31,32)4,33,34,35 ,36,37,38,39,40,41,42,43,44,48 2 time I=4 j=2 j=3 Â J=2 J=3 J=4 J=5 True True False True 1,2,3,4,5,6,7,8,9,10,11,12,13, 14,15,16,17,22,23,24,25,30, 31,32,(23,24,25, 26,27,28,29,30,31,32)4,33, 34,35,36,37,38,39,40,41, 42,43, 10,11,12,13,14,15,16,17, 18,19,20,21,22,(23,24,25,26, 27,28,29,30,31,32)2 ,(23,24,25,30,31,32,)2,33,38, 39,40,15,16,17,22,23,24,25, 26,27,28,29,30 ,31,32,(23,24,25,30,31,32,)2, 32,33,38,39,40,41,42, 43,44,45,46,47,48 Â 3 time I=5; J=2 J=2 False False True False 1,2,3,4,5,6,7,8,9,10,11, 12,13,14,15,16,17,22,23, 24,25,30,31,32, (23,24,25, 26,27,28,29,30,31,32)4, 33,34,35,36,37,38,39, 40,41,42,43, 10,11,12,13,14,15,16, 17,18,19,20,21,22, (23,24,25,26,27,28,29,30,31,32)2 , (23,24,25,30,31,32,)2, 33,38,39,40,15,16,17,22, 23,24,25,26,27,28,29,30 ,31,32, (23,24,25,30,31,32,)2, 32,33,38,39,40,41,42,43, 10,11,12,13,14,15,16,17,22, (23,24,25,26,27,28,29,30,31,32)3, 33,34,35,36, 37,38,39,40, 15,16,17,22, (23,24,25,26,27,28,29,30,31,32)2, 33,34,35,36, 37,38,39,40, 15,16,17,22, 23, 24,25,26,27,28,29,30,31,32, 33,34,35,36, 37,38,39,40,41,42,43,44,48, Â  Â  Â