Question

Trace the following code and enter correct information into the working memory box.

Code Memory Working Memory #include <stdio.h> // Prototypes double factorial(int); void main() 1 int num; // Number from user double fact; // Get value from user do { printf ("Give an integer greater or equal to zero : "); scanf("%d", &num); if (num < 0) printf ("Value must be larger or equal to zero.\n"); } while (num < 0); fact = factorial (num); printf ("The factorial of $d is fg\n", num, fact); double factorial (int n) double fact; // to calculate n! int integer; // teger for making calculation fact = 1.0; for(integer = 1; integer <= n; integer = integer + 1) 1 fact = fact* integer; } return (fact); // returns n! Console Give an integer greater or equal to zero: -3 Value must be larger or equal to zero. Give an integer greater or equal to zero: 10 The factorial of 10 is 3.6288e+006 CPU

Answer 1

Code Memory #include <stdio.h> // Prototypes double factorial (int); void main() 1 int num; / Number from user double fact; // Get value from user do When we call the main method then main program is loaded into the Ram and all the local variables are stored in stack. In do-while loop first do statements will execute whether the condition is true or not. Then printf statement stores the String inside the MemoryBuffer and reads character by character until read the last pont and then print the output to the console. scanf statement is just opposite the printf it takes input from the user in the form of String and then converts into into the desired type by analysing the argument that we passed in it and allocate value to given variable. After this Our factorial method is call which returns an integer value and can be stored in fact variable. printf"Give an integer greater or equal to zero : "); scanf("%d", &num); if (num < 0) print E "Walue must be larger or equal to zero. \n"); } while (num < 0); fact = factorial (num); printf ("The factorial of ld is g\n", num, fact), double factorial int n) double fact; to calculate n! int integer; Jr integer for making calculation fact = 1.0; for (integer = 1; integer <= n; integer = integer + 1) + fact = fact* integer; 3 return (fact); // returns n! This method takes space inside the stack. Inside this method space in stack again two variables are created and gets the memory location as well as different address. After this fact variable initialises with value and inside this methods space for block is created and this for loop pass all the calculation to ALU(Arithmetic Logical Unit). And when this loop is completed return the value of fact. ) Console Give an integer greater or equal to zero: -3 Value must be larger or equal to zero. Give an integer greater or equal to zero: 10 The factorial of 10 is 3.6288e+006 CPU initialise value int Factorial Stack 1.0 fact integer This means our fact is pointing to the factorial whose return type is integer value Main factorial (user input) main num fact

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