Answer to Question #300974 in C for Fayaz

Question

A company is offering a special discount to its customers based on an algorithm two range values are fed to the algorithm and in return it will calculate the discount to offer to the customers the discount is calculated as the sum of all.the prime numbers

Answer 1

#include<stdio.h>
#include<math.h>


int isPrime(int regNumber){
	if (regNumber < 2){
		return 0;
	}
	if (regNumber == 2 || regNumber == 3){
		return 1;
	}
	for (int i = 2; i <= sqrt(regNumber * 1.0); i++){
		if (regNumber % i == 0){
			return 0;
		}
	}
	return 1;
}
int main(){
	int number1;
	int number2;
	int i;
	int sum=0;
	printf("Input number 1: ");
	scanf("%d",&number1);
	printf("Input number 2: ");
	scanf("%d",&number2);
	for(i=number1;i<=number2;i++){
		if(isPrime(i)){
			sum+=i;
		}
	}
	printf("Discount: %d\n\n",sum);
	scanf("%d",&sum);
	return 0;
}