Eli Kalish Assignment 6

Assignment6.txt

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+1. What will be output of following C code? Explain your answer.
+int main() {
+	struct employee
+	{
+		unsigned int id = 8;
+		unsigned int sex = 1;
+		unsigned int age = 7;
+	};
+	struct employee emp1={203,1,23};
+	clrscr();
+	printf("%d\t%d\t%d",emp1.id,emp1.sex,emp1.age);
+	getch();
+}
+	The output would either be an error. Structures must be declared outside the main statement.
+	Since it isn't here, the rest of the code calling upon the structure would just come up
+	with errors.
+2. How are structures and enumerations similar and different? Give an example of when you would
+use each.
+	Structures and enumerations are both similar in that they can hold many different values
+	in one package(This is probably the wrong word for that). They're different in that a
+	structure can hold multiple different variables and/or different vairable types, whereas
+	enums are more like symbols for auto-set values. An example for enums is for the monthes
+	of the year and assigning each of them their corresponding value (January is 1, February
+	is 2, etc). Structures to me seem to have a much wider use and are used to store lots
+	of related data for a specific person/thing.
+3. Explain the difference between passing an array directly to a function versus passing
+a structure containing an array? 
+	Normally an array is pass-by reference, meaning when is used in a function, a new reference
+	to the existing array is created rather than a new identical array. An array within a
+	structure, however, can be passed by value, or more accurately called by value. When
+	you have an array within a structure, and then pass that structure to a function,
+	the array is copied as it would be if it were pass by value.
+
+

banking.c

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+#include <stdio.h>
+
+typedef struct BankAccount
+{
+	char name[100];
+	int account;
+	float balance;
+} bank;
+
+float withdraw(float a)
+{
+	printf("How much money do you want to withdraw?\n");
+	float w;
+	scanf("%f", &w);
+	printf("Previous balance: %f\nCurrent balance: %f\n", a, a - w);
+	return a - w;
+}
+
+float deposit(float a)
+{
+	printf("How much money do you want to deposit?\n");
+	float d;
+	scanf("%f", &d);
+	printf("Previous balance: %f\nCurrent balance: %f\n", a, a + d);
+	return a + d;
+}
+
+int main()
+{
+	printf("This is a bank. Time to set up your account.\n");
+	bank cust1 = {"Johnny Money", 214365, 60000.00};
+	printf("Your name is %s, your account number is %d, and you currently have $%f\n", cust1.name, cust1.account, cust1.balance);
+	printf("I would make it so you can have your own money and name but nobody got time for that.\n");
+	int cont = 0;
+	do {
+		printf("Welcome to the bank operations screen, %s. You currently have $%f\n", cust1.name, cust1.balance);
+		printf("Withdraw (1), Deposit (2), or exit (0)?\n");
+		int user;
+		scanf("%d", &user);
+		switch (user) {
+			case 1:
+				cust1.balance = withdraw(cust1.balance);
+				break;
+			case 2:
+				cust1.balance = deposit(cust1.balance);
+				break;
+			case 0:
+				printf("Thanks for coming to the bank, please come again.\n");
+				cont++;
+		}
+	} while (cont == 0);
+return 0;
+}

complex.c

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+#include <stdio.h>
+
+typedef struct ComplexNumbers {
+	int real;
+	int i;
+} comp;
+
+int main() 
+{
+	printf("This program performs calculations on two complex numbers.\n");
+	printf("First please enter the real part of the complex number, enter, and then the imaginary part(but don't include i when you type it)\n");
+	printf("Please enter the first complex number\n");
+	comp c1;
+	scanf("%d", &c1.real);
+	scanf("%d", &c1.i);
+	printf("You entered %d + %di\n", c1.real, c1.i);
+	printf("Please enter the second complex number\n");
+	comp c2;
+	scanf("%d", &c2.real);
+	scanf("%d", &c2.i);
+	printf("You entered %d + %di\n", c2.real, c2.i);
+	printf("What computation would you like to perform?\n?");
+	printf("Addition (1), Subtraction (2), Multiplication (3), or Division (4)?\n");
+	int user;
+	scanf("%d", &user);
+	switch (user)
+	{
+		case 1:
+			printf("You chose addition\n");
+			printf("(%d + %di) + (%d + %di) = %d + %di\n", c1.real, c1.i, c2.real, c2.i, c1.real + c2.real, c1.i + c2.i);
+			break;
+		case 2:
+			printf("You chose subtraction\n");
+			printf("(%d + %di) - (%d + %di) = %d + %di\n", c1.real, c1.i, c2.real, c2.i, c1.real - c2.real, c1.i - c2.i);
+			break;
+		case 3:
+			printf("You chose multiplication\n");
+			printf("(%d + %di) * (%d + %di) = %d + %di\n", c1.real, c1.i, c2.real, c2.i, c1.real * c2.real - c1.i * c2.i, c1.real * c2.i + c1.i * c2.real);
+			break;
+		case 4:
+			printf("You chose division\n");
+			printf("(%d + %di) / (%d + %di) = %f + %fi\n", c1.real, c1.i, c2.real, c2.i, (c1.real * c2.real + c1.i * c2.i)/ (float) (c2.real * c2.real + c2.i * c2.i), (c1.i * c2.real - c1.real * c2.i) / (float) (c2.real * c2.real + c2.i * c2.i)); //I get this is stupidly long but at this point I'm just proud it works
+			break;
+	}
+	return 0;
+}

studAve.c

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+#include <stdio.h>
+#include <string.h>
+
+typedef struct {
+	char name[100];
+	int age;
+	int scores[5];
+} student;
+
+int main()
+{
+	student s1 = {"Boogie", 16, {75, 80, 85, 90, 95}};
+	student s2 = {"Richard Nixon", 103, {61, 57, 100, 89, 74}};
+	student s3 = {"Fork on the Left", 4, {40, 80, 100, 95, 90}};
+	student s4 = {"Caroline", 17, {93, 95, 96, 97, 100}};
+	student s5 = {"Sylvanas Windrunner", 45, {84, 76, 98, 77, 65}};
+	student store[5] = {s1, s2, s3, s4, s5};
+	for (int i = 0; i < 5; i++)
+	{
+		float ave = (store[i].scores[0]+store[i].scores[1]+store[i].scores[2]+store[i].scores    [3]+store[i].scores[4])/ 5.0;
+		printf("%s: %f\n", store[i].name, ave);
+	}
+	return 0;
+}
+