Question

2. Use function to write a program that prints all prime numbers in a range of a user input numbers.

a. Draw a flow chart for the function IsaPrimenumber [5 marks]

b. Draw a flow chart for the whole scenario [10 marks]

c. Convert the flow charts to a c program. [15 marks]

In C programming language

Answer 1

#include<stdio.h>
int IsaPrimenumber(int n)
{
   for(int i=2;i*i<=n;i++)
   if(n%i==0)return 0;//not a prime
  
   return 1;//prime
  
}
int main()
{
   int n;
   printf("Enter a number:");
   scanf("%d",&n);
   for(int i=2;i<=n;i++)
   if(IsaPrimenumber(i)==1)//if it is prime number
   printf("%d ",i);
  
   return 0;
}

output:

Enter a number:20
2 3 5 7 11 13 17 19

Process exited normally.
Press any key to continue . . .