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Tuesday, 9 July 2013

C program to print even, odd and prime factors of a given number

Write a C program to print even, odd and prime factors of a given number.


  #include <stdio.h>
  #include <string.h>

  /* tell whether the given number is even, odd or prime */
  void numType(int data, char *type) {
        int i, flag = 1;

        /* checking whether the given no is prime */
        for (i = 2; i <= data - 1; i++) {
                if (data % i == 0) {
                        flag = 0;
                        break;
                }
        }

        if (data != 1 && flag) {
                strcpy(type, "a prime");
                return;
        }

        /* check for even or odd */
        if (data % 2 == 0) {
                strcpy(type, "an even");
        } else {
                strcpy(type, "an odd");
        }
        return;
  }

  int main() {
        int num, i;
        char type[32];

        /* get the input value from the user */
        printf("Enter the value for n:");
        scanf("%d", &num);

        /* prints factors and its type */
        for (i = 1; i <= num; i++) {
                if (num % i == 0) {
                        numType(i, type);
                        printf("Factor %d is %s number\n", i, type);
                }
        }

        return 0;
  }



  Output:
  jp@jp-VirtualBox:~/$ ./a.out
  Enter the value for n:100
  Factor 1 is an odd number
  Factor 2 is a prime number
  Factor 4 is an even number
  Factor 5 is a prime number
  Factor 10 is an even number
  Factor 20 is an even number
  Factor 25 is an odd number
  Factor 50 is an even number
  Factor 100 is an even number




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3 comments:

  1. C program to check odd or even

    In general Even numbers are those which are divisible by 2, and which numbers are not divisible 2 is called odd numbers.
    We can easily write even odd program in c programming.

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