C Exercises: Check whether a given number is a perfect cube or not

Last update on May 27 2022 12:25:48 (UTC/GMT +8 hours)

C Numbers: Exercise-29 with Solution

Write a program in C to check whether a given number is a perfect cube or not.

Test Data
Input a number: 125

Sample Solution:

C Code:

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


int main() 
{ 
int num, curoot,ans; 

 printf("\n\n Check whether a number is a perfect cube or not: \n");
 printf(" -----------------------------------------------------\n");
    printf(" Input a number: ");
    scanf("%d",&num);
curoot=round(pow(num, 1.0/3.0));

if(curoot*curoot*curoot==num)
{
  printf(" The number is a perfect Cube of %d \n",curoot);   
}
else
{
  printf(" The number is not a perfect Cube.\n");   
}
}

Sample Output:

 Input a number: 125                                                                                          
 The number is a perfect Cube of 5

Pictorial Presentation:

C programming: Check whether a given number is a perfect cube or not.

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Next: Write a program in C to display first 10 Fermat numbers.

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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