An example Analysis of the output of Twin Primes in C language

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1. Topic content:

Twin primes are adjacent primes with an interval of 2, for example, the smallest pair of twin primes is 3 and 5, and so are 5 and 7 (5 is repeated but counted as 2 groups).

two。 Input format:

Enter N to find out the group number of twin primes between 2 and N.

It should be noted that the input N does not exceed the maximum range represented by int

3 output format:

Output the number of prime twins between 2 and N, and then output the number of groups.

The code is as follows:

# includeint Function (int n) / / function to determine whether it is a prime {for (int iTunes 2; I)