/* Determine if the numbers between 2 and 9 are prime numbers */ #include <stdio
ID: 3797619 • Letter: #
Question
/* Determine if the numbers between 2 and 9 are prime numbers */
#include <stdio.h>
int main()
{
int c, number, i=0;
printf("Enter a number between 2 and 9 ");
scanf("%d", &number);
for ( c = 2; c <= number; c++);
{
if(c % i == 0)
number = number + 1;
}
switch(number)
{
case 2:
case 3:
case 5:
case 7:
printf("You entered a prime number ");
break;
case 4:
case 6:
case 8:
printf("You entered a composite number ");
break;
default:
printf("Invalid value entered. ");
}
return 0;
}
This is the program i wrote for my C problem, I think I'm having difficulty determining if the number is prime. I don't know where I went wrong. It has to be a switch statement.
Explanation / Answer
Program:
#include <stdio.h>
int main()
{
int c, number, i=0;
printf("Enter a number between 2 and 9 : ");
scanf("%d", &number);
for(c=2;c<=number/2;c++){
if(number%i==0){
i = i + 1;
}
}
switch(number)
{
case 2:
case 3:
case 5:
case 7:
printf("You entered a prime number ");
break;
case 4:
case 6:
case 8:
printf("You entered a composite number ");
break;
default:
printf("Invalid value entered. ");
}
return 0;
}
Output:
Enter a number between 2 and 9 : 2
You entered a prime number
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