Pass Week 9/22 Solutions

PROBLEM 1 SOLUTIONS



Problem #1A Solution



#include <stdio.h>

int main(void){
	//Local Declarations
	float base = 0.0;
	float area = 0.0;

	//Local Statements

	//prompt user
	printf("Enter in a value for the base of a square.\n");

	//get input
	scanf("%f", &base);

	//process data
	area = base * base;

	//output information
	printf("The area of a square is %8.2f\n", area);

	return 0;
}//end main















Problem #1B Solution



#include <stdio.h>

float ComputeAreaOfSquare(float);

int main(void){

	//Local Declarations
	float base = 0.0;
	float area = 0.0;

	//Local Statements

	//prompt user
	printf("Enter in a value for the base of a square.\n");

	//get input
	scanf("%f", &base);

	//process data by calling your function
	area = ComputeAreaOfSquare(base);

	//output information
	printf("The area of a square is %8.2f\n", area);

	return 0;
}//end main


//You would write function descriptions here
float ComputeAreaOfSquare(float baseIn){

	float area = baseIn * baseIn;
	return area;

}//end function


















Problem #1C Solution



#include <stdio.h>

void PrintInstructions(void);
float GetInput(void);
float ComputeAreaOfSquare(float);
void PrintOutput(float);

int main(void){

	//Local Declarations
	float base = 0.0;
	float area = 0.0;
	//Local Statements
	PrintInstructions();
	base = GetInput();
	area = ComputeAreaOfSquare(base);
	PrintOutput(area);
	return 0;

}//end main


//You would write function descriptions here
void PrintInstructions(){

	printf("Enter in a value for the base of a square.\n");
	return;

}//end function


//You would write function descriptions here
float GetInput(){

	float baseIn = 0.0;
	scanf("%f", & baseIn);
	return baseIn;

}//end function


//You would write function descriptions here
float ComputeAreaOfSquare(float baseIn){

	float area = baseIn * baseIn;
	return area;

}//end function


void PrintOutput(float areaIn){

	printf("The area of a square is %8.2f\n", areaIn);
	return;

}//end function









Problem #1 Solution Review and Discussion
1. All function declarations should be in the global declarations area.

2. Notice the formal return statements in each function.

3. Notice that I have not added function descriptions. This is for brevity in
the lecture, you should include them on your deliverables.

4. In the final solution notice how clean that the main function is? Its
mostly all function calls.

5. We have assumed all data entered was valid and in range. Normally you
would always test input before processing it.

6. All of these problems are using the design construct of sequence. In
coming modules we will be using selection and repetition.























Problem #2 Solution



#include <stdio.h>

void GetParts(int*, int*, double);

int main(void){

	double srcNbr = 0.0;
	int nbr1 = 0;
	int nbr2 = 0;

	printf("Enter in a floating point value: ");
	scanf("%lf", &srcNbr);

	GetParts(&nbr1, &nbr2, srcNbr);

	printf("The whole number is: %d and the fractional is: %d\n", nbr1, nbr2);

	return 0;

}//end main


void GetParts(int* nbr1, int* nbr2, double srcNbr){

	int whole, fractional;
	double fraction;

	whole = (int) srcNbr;
	fraction =(srcNbr * 100) / 100 - whole;
	fractional = (int)(fraction*100);

	*nbr1 = whole;
	*nbr2 = fractional;

	return;

}//end function