# C Exercises: Find the Floor and Ceil of the number 0 to 10 from a sorted array

## C Array: Exercise-41 with Solution

Write a program in C to find the Floor and Ceiling of the number 0 to 10 from a sroted array.

**Pictorial Presentation:**

**Sample Solution:**

**C Code:**

```
#include <stdio.h>
int FindCeil(int arr1[], int n, int x)
{
int low = 0, high = n - 1, mid;
int ceil = -1;
while (low <= high)
{
mid = (low + high) / 2;
if (arr1[mid] == x)
return arr1[mid];
else if (x < arr1[mid])
{
ceil = arr1[mid];
high = mid - 1;
}
else
low = mid + 1;
}
return ceil;
}
int FindFloor(int arr1[], int n, int x)
{
int low = 0, high = n - 1, mid;
int floor = -1;
while (low <= high)
{
mid = (low + high) / 2;
if (arr1[mid] == x)
return arr1[mid];
else if (x < arr1[mid])
high = mid - 1;
else
{
floor = arr1[mid];
low = mid + 1;
}
}
return floor;
}
int main()
{
int arr1[] = { 1, 3, 5, 7, 8, 9 };
int ctr = sizeof(arr1) / sizeof(arr1[0]);
int i;
//------------- print original array ------------------
printf("The given array is : ");
for(i = 0; i < ctr; i++)
{
printf("%d ", arr1[i]);
}
printf("\n");
//--------------------------------------------
for (int i = 0; i <= 10; i++)
{
printf("Number: %d ", i);
printf("ceiling is: %d ", FindCeil(arr1, ctr, i));
printf("floor is: %d\n", FindFloor(arr1, ctr, i));
}
return 0;
}
```

Sample Output:

The given array is : 1 3 5 7 8 9 Number: 0 ceiling is: 1 floor is: -1 Number: 1 ceiling is: 1 floor is: 1 Number: 2 ceiling is: 3 floor is: 1 Number: 3 ceiling is: 3 floor is: 3 Number: 4 ceiling is: 5 floor is: 3 Number: 5 ceiling is: 5 floor is: 5 Number: 6 ceiling is: 7 floor is: 5 Number: 7 ceiling is: 7 floor is: 7 Number: 8 ceiling is: 8 floor is: 8 Number: 9 ceiling is: 9 floor is: 9 Number: 10 ceiling is: -1 floor is: 9

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## C Programming: Tips of the Day

**C Programming - What is the argument for printf that formats a long?**

Put an l (lowercased letter L) directly before the specifier.

unsigned long n; long m; printf("%lu %ld", n, m);

Ref : https://bit.ly/3dIwfkP

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