Let us go through a C program to check whether the number is Sunny Number or Not.
What is Sunny Number?
A number N is said to be a sunny number if the number next to the given number (N+1) is a perfect square.
Example: Let us take a Number 8, then the next number is 8+1=9 and as 3 is a square root of 9, hence 8 is a sunny Number.
Another example, let the number be 5, then 5+1=6, that has no square roots, hence 5 is not a sunny Number.
Program to check whether the number is Sunny Number or Not.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #include <stdio.h> #include <math.h> #include <stdbool.h > //for the use of boolean type bool is_sunny(int); int main(void) { int n; printf("Enter the number: "); scanf("%d", &n); if (is_sunny(n)) printf("%d is a sunny number.", n); else printf("%d is not a sunny number.", n); return 0; } bool is_sunny(int n) { int square = sqrt(n + 1); return (square *square == n); } |
Output:
Enter the number: 16
16 is a sunny number.
Display all the sunny number within a range of 0 to 100 in C programming
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #include <stdio.h> #include <math.h> #include <stdbool.h > //for the use of boolean type bool is_sunny(int); int main(void) { int n; printf("List of sunny number from 0 to 100 range: \n"); for (n = 0; n < 100; ++n) { if (is_sunny(n)) printf("%d\n", n); } return 0; } bool is_sunny(int n) { int square = sqrt(n + 1); return (square *square == n); } |
Output:
List of sunny number from 0 to 100 range:
1
4
9
16
25
36
49
64
81