Question

NOTE: in mathematics, the square root of a negative number is not real; in C therefore, passing such a value to the square root function is an error. Given a double variable named areaOfSquare write the necessary code to read in a value, the area of some square, into areaOfSquare and print out the length of the side of that square. HOWEVER: if any value read in is not valid input, just print the message "INVALID".

Answer 1

# include<math.h>

# include<stdlib.h>

# include<stdio.h>

int main()

{

int choice;

double area;

printf("Enter the area of Square:");

scanf("%lf", &area);

printf("Enter the choice: 1, 2:");

scanf("%d", &choice);

switch(choice)

{

case 1:if(area<0.00)

{

printf(" INVALID");

break;

}

else

{

printf("side of square: %lf", sqrt(area));

break;

}

break;

case 2: break;

}

return 0;

}

Step-by-step explanation:

Here, if area is less than 0 then invalid message is printed out. And if area is more than 0 then the sqrt is calculated and the side of a square length is being printed out. And that is what is required. lf is for double. And math.h is included to make use of the sqrt function.