Intro to C

What does /prog/ think of my information on number code? These are the only tools we were allowed to use plus for loops but I felt like using while when doing this.

#include <stdio.h>

int main()

{

int num;
int down;
int up;
int count;
int fix;

while (num != -9876)
        {
printf("\n-------------------------------------------------------\n\n");

printf("Enter a number to learn about or enter -9876 to quit: ");
scanf("%d", &num);
if (num == -9876)
{
return 0;
}
if (num < 0)
{
printf("\n\nPlease choose a positive number.\n\n");
}
else
{
printf("You chose the number: %d\n", num);
down = num-1;
up = num+1;
printf("The number before %d is %d\n", num, down);
printf("The number after %d is %d\n", num, up);
if (num % 2 == 0)
{
printf("%d is even.\n", num);
}
if (num % 2 != 0)
{
printf("%d is odd.\n", num);
}
count = 1;
fix = num;
printf("The next five numbers are: ");
while (count <=5)
{
count = count+1;
fix = fix+1;
printf("%d ", fix);
}
printf("\n"); 
if (num%5==0)
{
printf("%d is a multiple of five.\n", num);
}
fix = num;
fix = fix * fix;
printf("%d squared is %d.\n", num, fix);
count=0;
fix = 0;
up = 0;
while (fix <= num)
{
up = up + 1;
if ((num / (up*7)) > 0)
{
count = count + 1;
}
else
{
(fix = num + 1);
printf("Seven fits into %d %d time(s).\n", num, count); 
}
}
fix = 0;
count=0;
while (count < num)
{
    fix = fix+1;
if (fix*fix==num)
{
printf("%d is %d squared.\n", num, fix);
count=num+1;  
}
if (fix*fix>num)
{
printf("%d is not a perfect square.\n", num);
count = num + 1;
}
}
count=0;
up=1;
while (count < num)
{
up = up+1;
if (num % up == 0 && up != num)
{
printf("%d is not prime.\n", num);
count = num + 1;
}
else
{
if (up >= num)
{
printf("%d is prime.\n", num);
count = num + 1;
}
}
}      
}
}
return 0;
}

>>10
I'd suggest &1 but i think you'll have endianess issues with that.
What