11-01-2004, 08:18 AM
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#1
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Member (5 bit)
Join Date: Dec 2003
Posts: 26
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Prime numbers in C language
Hello, I'm quite new to the C language and I wanted to try and make a program that'll input a number from the user and tell him whether it is prime or not.
This is the program I tried to build:
Quote:
#include
#include
#include
int main()
{
int i, number, square;
printf("Enter a potential prime:\n");
scanf("%d", &number);
square = sqrt(number);
for (i=2; i < square; i++)
{
if(number%i==0)
printf("Number is prime.\n");
else
printf("Number is not prime because it is divisible by %d", i);
}
getch();
return 0;
}
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No matter what number I input it tells me it is divisible by 2. Please help me if you know how to fix it...
Thanks ahead.
Perrikus.
Last edited by perrikus; 11-01-2004 at 08:27 AM.
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