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C Exercises: Check whether a given positive number is a multiple of 3 or a multiple of 7

C-programming basic algorithm: Exercise-5 with Solution

Write a C program to check whether a given positive number is a multiple of 3 or a multiple of 7.

C Code:

#include <stdio.h>
#include <stdlib.h>
int main(void){
    printf("%d",test(3));
    printf("\n%d",test(14));
    printf("\n%d",test(12));
    printf("\n%d",test(37));
    }   
   int test(int n)
        {
            return n % 3 == 0 || n % 7 == 0;
        }

Sample Output:

1
1
1
0

Pictorial Presentation:

C Programming Algorithm: Check whether a given positive number is a multiple of 3 or a multiple of 7

Flowchart:

C Programming Algorithm Flowchart: Check whether a given positive number is a multiple of 3 or a multiple of 7

C Programming Code Editor:

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Previous: Write a C program to check a given integer and return true if it is within 10 of 100 or 200.
Next: Write a C program to check whether a given temperatures is less than 0 and the other is greater than 100.

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C Programming: Tips of the Day

Why doesn't a+++++b work?

printf("%d",a+++++b); is interpreted as (a++)++ + b according to the Maximal Munch Rule!.

++ (postfix) doesn't evaluate to an lvalue but it requires its operand to be an lvalue.

! 6.4/4 says the next preprocessing token is the longest sequence of characters that could constitute a preprocessing token"

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