int isPrime(unsigned int p) { if (p<2)return false; // 0 and 1 are not prime if (p==2)return true; // 2 is a prime floats=sqrt(p); for(unsignedint i=2; i<=s; i++) { // if p isdivisible by i, then it is not prime if (p % i== 0) return false; } // p is notdivisible by any number from 2 to sqrt(p), so it is prime return true; }
int main() { unsigned intn=10; // number of primes unsigned intsum=0; // sum of primes unsigned intp=2; for(unsignedint i=0; i<n; i++) { // look forthe next prime while(!isPrime(p)) {p++;}; // cout<< p << endl; sum+=p; p++; } cout <<"Sum of first " << n << " primes is " << sum << endl; return 0; }
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