Introduction A function is a named sequence of instructions that performs a spec

Question

Introduction A function is a named sequence of instructions that performs a specific task and returns the result of ts computation. Once defined, it can be then called in your program wherever that particular task should be performed A function can receive zero or more arguments. For example, consider a function sum which receives three arguments, here nameda.b,and c. and retums their sum: int sum(int a, int b, int c) return atb To execute (or call) a function, you must supply its arguments. For example, if you want to compute the sum of 500, 600, and 700, you can write: sum(500, 600, 700) #include using namespace std Defining a function that computes the sum of three integers int sum(int a, int b, int c) return a+bc int main) ( // Ne call it with the actual argumenta 1, 20, 300 1 and save the result in a variable x int xsum(, 20, 300) Prints 321 Let's define a function that computes the maximum of two integers: Returns the maxinum of tvo arguments int max2(int a, int b) ( if (a b) return a else f return b Then one can find the maximum of thee integers, for example, like this: max2 { max2 (135. 8763), 500 // would return 8763

Explanation / Answer

#include<iostream>

using namespace std;

//check whether given number or not

bool isPrime(int n){

int i, c=0;

for(i=2; i<n; i++){

if(n%i==0)

c++;

}

return c==0;

}

//checking Twin Prime with help of isPrime

bool isTwinPrime(int n){

if(isPrime(n+2) || isPrime(n-2))

return true;

return false;

}

//finding next Twin Prime with help of isTwinPrime

int nextTwinPrime(int n){

while(1){

if(isPrime(n)){

if(isTwinPrime(n)){

return n;

}

}

n++;

}

}

int main(){

if(isTwinPrime(23)){

cout<<"Yes"<<endl;

}

else{

cout<<"Not"<<endl;

}

cout<<nextTwinPrime(15)<<endl;

return 0;

}

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