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C Exercises: Find Duck Numbers between 1 to 500

C Numbers: Exercise-24 with Solution

Write a program in C to find Duck Numbers between 1 to 500.

Sample Solution:

C Code:

# include <stdio.h>
# include <stdlib.h>


int main()
{
    int dno,dkno,r,flg;
	flg=0;
 printf("\n\n Find Duck Numbers between 1 to 500: \n");
 printf(" ----------------------------------------\n");
 printf(" The Duck numbers are: ");
for(dkno=1;dkno<=500;dkno++)
	{
	dno=dkno;
	flg=0;
    while(dno>0)
        {
            if(dno % 10==0)
            {
            flg=1;
            break;

            }
			dno/=10;
        }
            if(dkno>0 && flg==1)
            {
            printf("%d ",dkno);
            }
	}
	printf("\n");
}

Sample Output:

The Duck numbers are: 10 20 30 40 50 60 70 80 90 100 101 102......

Pictorial Presentation:

C programming: Find Duck Numbers between 1 to 500.

Flowchart:

Flowchart: Find Duck Numbers between 1 to 500.

C Programming Code Editor:

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C Programming: Tips of the Day

Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?

It is a quirk of the syntax for passing arrays to functions.

Actually it is not possible to pass an array in C. If you write syntax that looks like it should pass the array, what actually happens is that a pointer to the first element of the array is passed instead.

Since the pointer does not include any length information, the contents of your [] in the function formal parameter list are actually ignored.

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