So my program basically allows the user to enter a positive integer and then a menu will pop up like this:
Enter a positive integer: 11
1. Is the given number an even or an odd number
2. Find out if this number is a prime number or not
3. Calculate the factorial of this number
4. Find the sum of the numbers from 0 to this number
5. Return and integer showing the number in base of 8
6. Exit
Your choice: .....
Then the user can pick which ever function they want to do and the program will print out the answer.
This program works perfectly fine on Dev C++, but when I copy the code to the Unix Server for my school using Putty, I get this weird issue for the sum function. Basically, when I run the program and choose 4 at the beginning I get the right answer for sum, 66(using input = 11). But if i go through each choice, starting from one and then go to four, i get 78. This was not an issue that all on Dev C++. Anyone know the reason?
Heres the code
Code:#include <stdio.h>
void menu();
int odd_even(int);
int prime(int);
int factorial(int);
int sum(int);
int base(int);
int main()
{
int input;
int choice = 0;
printf("Enter a positive integer: ");
scanf("%d", &input);
while (choice != 6 && input > 0)
{
menu();
printf("Your choice:");
scanf ("%d", &choice);
switch (choice)
{
case 1:
odd_even(input);
break;
case 2:
prime(input);
break;
case 3:
printf("The factorial of %d is %d", input, factorial(input));
break;
case 4:
printf("Sum of numbers from 0 to %d is %d", input, sum(input));
break;
case 5:
printf("%d in base 8 is %d", input, base(input));
break;
case 6:
printf("Goodbye!\n");
break;
default: /* If the value entered is invalid, prompt the user to enter again */
printf("\nInvalid Input. Try Again !\n");
}
}
return 0;
}
void menu()
{
printf("\n1. Is the given number even or odd \n");
printf("2. Find out if this number is prime or not \n");
printf("3. Calculate the factorial of this number \n");
printf("4. Find the sum of the numbers from 0 to this number \n");
printf("5. Return an integer showing the number in base of 8\n");
printf("6. Exit\n");
}
int odd_even(int input)
{
if (input%2 == 0)
printf(" %d is an even number", input);
else
printf("%d is an odd number", input);
return 0;
}
int prime(int input)
{
int divisor;
for (divisor = 2; divisor <= input; divisor++) {
if (input%divisor != 0 && input != divisor)
printf("%d is a prime number", input);
else
printf("%d is not a prime number", input);
break;
}
return 0;
}
int factorial(int input)
{
int count;
int result = 1;
for (count = 1; count <= input; count++)
result = result * count;
return result;
}
int sum(int input)
{
int count = 0;
int sum;
for (count = 0; count <= input; count++)
sum = count + sum;
return sum;
}
int base(int input)
{
int digits, power, result;
power = 1; /*Value of digit position 0*/
result = 0; /*Where the decimal result will go*/
while(input > 0)
{
digits = input % 8; /*Get right most digit*/
result += digits * power; /*If 1, add its position value to the result*/
power *= 10; /*Increase the value of the next digit position*/
input /= 8; /*Knock off the right most digit*/
}
return result;
}
