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Get factor of number using C programming language, check if a number is prime or composite.
cpp code
void factor(int number, int n, int j) {
// Define integer
int i;

// 1 is not a prime number
if (n == 1) {

printf("1 is a unit\n");
return;

}



i = j;

while (i <= (int)(sqrt((double)n))) {
if (n % i == 0) {
// print a prime number i and continue search
fprintf(stdout, "%d\n", i);
factor(number, (int)(n / i), i);
return;

}

else {

i++;

}

}

// If you got this part means that n is prime number.
if (n == number)
printf("%d is prime\n", number);
else
printf("%d\n", n);

return;

}




_________________
M. S. Rakha, Ph.D.
Queen's University
Canada


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