feature/TYC_in_24_H_part2

helloworld/H10_E1.c

@@ -0,0 +1,65 @@
+//1. Rewrite the program in Listing 10.1. This time, use the logical expression 
+//i%6 ==0 in the if statement.
+#include <stdio.h>
+main() {
+	setbuf(stdout, NULL);
+	printf("1. feladat. \n");
+	int i;
+	printf("Integers that can be divided by both 2 and 3\n");
+	printf("(within the range of 0 to 100):\n");
+	for (i=0; i<=100; i++) {
+		if (i % 6 == 0) {
+		printf(" %d\n", i);
+		}
+	}
+
+//2. Rewrite the program in Listing 10.1 by using nested if statements.
+
+	printf("2. feladat. \n");
+	//int i; ha önálló progi lenne, kellene
+	printf("Integers that can be divided by both 2 and 3\n");
+	printf("(within the range of 0 to 100):\n");
+	for (i=0; i<=100; i++) {
+		if (i % 2 == 0) {
+			if (i % 3 == 0) {
+				printf(" %d\n", i);
+			}
+		}
+	}
+
+//3. Write a program to read characters from the standard I/O. If the characters
+// are A, B,and C, display their numeric values on the screen. 
+// (The switch statement is required.)
+	printf("3. feladat. \n");
+	char ch = '0';
+	printf("Please type in one character:\n");
+	ch = getc(stdin);
+	switch (ch) {
+		case 'A': 
+		printf("A kódja: %d\n", ch);
+		break;
+		case 'B': 
+		printf("B kódja: %d\n", ch);
+		break;
+		case 'C': 
+		printf("C kódja: %d\n", ch);
+		break;
+		default:;
+	}
+//4. Write a program that keeps reading characters from the standard input until 
+//the character q is entered.
+	printf("4. feladat. \n");
+	printf("Ezt a feladatot a 8. leckénél megoldottuk már :-)\n");
+
+//5. Rewrite the program in Listing 10.7. This time, instead of skipping 3 and 5, 
+//skip the integer that can be evenly divided by both 2 and 3.
+	printf("5. feladat. \n");
+	int sum = 0;
+	for (i=1; i<8; i++) {
+		if ((i % 2 ==0) || (i % 3 ==0))
+			continue;
+		sum += i;
+	}
+	printf("The sum of 1, 5, and 7 is: %d\n", sum);
+	return 0;
+}

helloworld/H8_E1.c

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+//1. Given x = 0xEFFF and y = 0x1000 (that is, EFFF and 1000 as hex values), what
+//hex values do you get by evaluating ~x and ~y?
+//
+// Egymás ellentettjei, ezt már tisztáztuk :-)
+
+//2. Taking the values of x and y assigned in Exercise 1, write a program that prints
+//out the values of !x and !y by using both the %d and %u formats in the printf()
+//function.
+
+#include <stdio.h>
+
+main() {
+	setbuf(stdout, NULL);
+	printf("2. feladat. \n");
+	int x = 0xEFFF;
+	int y = 0x1000;
+	printf("The values of !x and !y is: %d, %d\n", !x, !y);
+	printf("The values of !x and !y is: %u, %u\n", !x, !y);
+
+ // Na, hogy ennek mi értelme volt :-(
+
+//3. Given x = 123 and y = 4, write a program that displays the results of the 
+//expressions x << y and x >> y.
+	printf("3. feladat. \n");
+	x = 123;
+	y = 4;
+	printf("The values of x << y is: %d\n", x << y);
+	printf("The values of x >> y is: %d\n", x >> y);
+
+
+
+//4. Write a program that shows the values (in hex) of the expressions 0xFFFF^0x8888,
+//0xABCD & 0x4567, and 0xDCBA | 0x1234.
+
+	printf("4. feladat. \n");
+	printf("The value of the expressions 0xFFFF^0x8888 is: %X\n", 0xFFFF^0x8888);
+	printf("The value of the expressions 0xABCD & 0x4567 is: %X\n", 0xABCD & 0x4567);
+	printf("The value of the expressions 0xDCBA | 0x1234 is: %X\n", 0xDCBA | 0x1234);
+
+//5. Use the ?: operator and the for statement to write a program that keeps taking the
+//characters entered by the user until the character q is accounted. (Hint: Put x!=’q’
+//? 1 : 0 expression as the second expression in a for statement.)
+
+	printf("5. feladat. \n");
+	char ch = '0';
+	printf("Please type in one character:\n");
+	for (int i=0; ch!='q' ? 1 : 0;) {
+		ch = getc(stdin);
+	}
+	return 0;
+}

helloworld/H9_E1.c

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+//1. Given the following statements,
+//int x;
+//unsigned int y;
+//x = 0xAB78;
+//y = 0xAB78;
+//write a program to display the decimal values of x and y on the screen.
+
+#include <stdio.h>
+#include <math.h>
+main() {
+	setbuf(stdout, NULL);
+	printf("1. feladat. \n");
+	int x;
+	unsigned int y;
+	x = 0xAB78;
+	y = 0xAB78;
+	printf("The decimal values of 0xAB78 is: %d\n", x);
+	printf("The decimal values of 0xAB78 is: %d\n", y);
+
+//2. Write a program to measure the sizes of short int, long int, and long double
+//on your machine.
+
+	printf("2. feladat. \n");
+	printf("The size of short int is: %d.\n", sizeof(short int));
+	printf("The size of long int is: %d.\n", sizeof(long int));
+	printf("The size of long double is: %d.\n", sizeof(long double));
+
+//3. Write a program to multiply two signed int variables with positive values, and
+//display the result as a long int.
+
+	printf("3. feladat. \n");
+
+	int a = 12;
+	int b = 84512;
+	printf("The productum of the variables is: %ld\n", a * b);
+
+//4. Write a program to display negative integers in hex format along with their signed int equivalents.
+
+	printf("4. feladat. \n");
+	int neg_num = -1;
+	printf("Please type in one negative number:\n");
+	scanf ("%d", &neg_num);
+	printf("%x equal %d\n", neg_num, neg_num);
+
+//5. Given an angle of 30 degrees, write a program to calculate its sine and tangentvalues.
+
+	printf("5. feladat. \n");
+	double angle = 30;
+	angle *= 3.141593 / 180.0;
+	printf("The sine of angle 30degree is %f, the tangent of it is: %f\n", sin(angle), tan(angle));
+
+//6. Write a program to calculate the non-negative square root of 0x19A1.
+	printf("6. feladat. \n");
+	int hex = 0x19A1;
+	printf("The square root of 0x19A1 is: %f\n",sqrt(hex));
+	return 0;
+}