C Exercises: Display the first 10 catalan numbers
C Numbers: Exercise-12 with Solution
Write a program in C to display the first 10 catalan numbers.
Sample Solution:
C Code:
# include <stdio.h>
# include <math.h>
# include <stdlib.h>
unsigned long int cataLan(unsigned int n)
{
if (n <= 1) return 1;
unsigned long int catno = 0;
for (int i=0; i<n; i++)
catno += cataLan(i)*cataLan(n-i-1);
return catno;
}
int main()
{
printf("\n\n Find the first 10 catalan numbers: \n");
printf(" --------------------------------------\n");
printf(" The first 10 catalan numbers are: \n");
for (int i=0; i<10; i++)
printf("%lu ",cataLan(i));
printf("\n");
return 0;
}
Sample Output:
The first 10 catalan numbers are: 1 1 2 5 14 42 132 429 1430 4862
Pictorial Presentation:
Flowchart:
C Programming Code Editor:
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Next: Write a program in C to check a number is a Happy or not.
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C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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