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3/ex1.c

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+#include <stdio.h>
+
+#define SUM(a,b) a + b
+#define DIFFERENCE(a,b) a - b
+#define MULTIPLICATION(a,b) a * b
+#define DIVIDE(a,b) a / b
+//---------------------------------------------------------------------------------------
+//                                              Exercise 1
+//                                              ----------
+//
+// General : The program do math with two numbers and one operator.
+//
+// Input   : 2 numbers (results), 1 char.
+//
+// Process : The program checks the operator and process math on 2 numbers.
+//
+// Output  : 1 number.
+//
+//---------------------------------------------------------------------------------------
+// Programmer : Cohen Idan
+// Student No : None
+// Date       : 19.09.2019
+//---------------------------------------------------------------------------------------
+void main(void)
+{
+    float num1,
+          num2,
+          result;
+    char opr;
+    printf("Enter mathematical expression (a + b): ");
+    scanf("%f %c %f", &num1, &opr, &num2);
+    switch (opr)
+    {
+    case '-':
+        result = DIFFERENCE(num1, num2);
+        break;
+    case '/':
+        result = DIVIDE(num1, num2);
+        break;
+    case '*':
+        result = MULTIPLICATION(num1, num2);
+        break;
+    default:
+        result = SUM(num1, num2);
+        break;
+    }
+
+    printf("The result: %f\n", result);
+}

3/ex2.c

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+#include <stdio.h>
+
+#define BOOLEAN unsigned short
+#define TRUE 1
+#define FALSE 0
+#define ONE_HUNDRED_SIXTY 160
+#define ONE_HUNDRED_FIFTY 150
+#define FORTY 40
+#define SIXTY 60
+#define ZERO 0
+#define MAX(a,b) a > b ? a : b
+#define MIN(a,b) a < b ? a : b
+//---------------------------------------------------------------------------------------
+//                                              Exercise 2
+//                                              ----------
+//
+// General : The program checks for the logical results of a championship game in 
+//           the basket ball.
+//
+// Input   : 2 numbers (results).
+//
+// Process : The program checks for the logical results by conditions.
+//
+// Output  : '1' if is it True, '0' is false.
+//
+//---------------------------------------------------------------------------------------
+// Programmer : Cohen Idan
+// Student No : None
+// Date       : 19.09.2019
+//---------------------------------------------------------------------------------------
+void main(void)
+{
+    unsigned short result1,
+                   result2,
+                   max_result,
+                   min_result,
+                   difference;
+    BOOLEAN answer = FALSE;
+    
+    printf("Enter 2 numbers: ");
+    scanf("%hu%hu", &result1, &result2);
+
+    max_result = MAX(result1, result2);
+    min_result = MIN(result1, result2);
+    difference = max_result - min_result;
+
+    if ((max_result <= ONE_HUNDRED_FIFTY) &&
+        (min_result >= FORTY) &&
+        (difference <= SIXTY) &&
+        (difference > ZERO))
+    {
+        answer = TRUE;                
+    }
+          
+    printf("The answer: %hu\n", answer);
+}

3/ex2_6.c

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+#include <stdio.h>
+#define ONE 1
+#define FOUR 4
+#define ZERO 0
+#define TWO 2
+//---------------------------------------------------------------------------------------
+//                                              Exercise 2_6
+//                                              ------------
+//
+// General : The program performs the formula of the roots.
+//
+// Input   : 3 numbers (a,b,c from ax^2+bx+c).
+//
+// Process : The program performs the formula of the roots.
+//
+// Output  : 2 numbers (sign and result).
+//
+//---------------------------------------------------------------------------------------
+// Programmer : Cohen Idan
+// Student No : None
+// Date       : 19.09.2019
+//---------------------------------------------------------------------------------------
+void main(void)
+{
+    short num_a,
+          num_b,
+          num_c,
+          delta,
+          sign = ONE,
+          result = ZERO;
+
+    printf("Enter a,b,c from ax^2+bx+c: ");
+    scanf("%hd%hd%hd", &num_a, &num_b, &num_c);
+
+    // Calculate delta
+    delta = (num_b * num_b) - (FOUR * num_a * num_c); 
+    result = -num_b / TWO * num_a;
+    if (delta > ZERO)
+    {
+        sign = TWO;
+        result = ZERO;
+    }
+    if (delta < ZERO)
+    {
+        sign = ZERO;
+        result = ZERO;
+    }
+
+    printf("If you got sign '0' - not result\n\
+If you got sign '1' - one result\n\
+If you got sign '2' - two results:\nSign: %hd\nResult: %hd\n", sign, result);
+}

3/ex2_7.c

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+#include <stdio.h>
+#define ONE 1
+#define TWO 2
+//---------------------------------------------------------------------------------------
+//                                              Exercise 2_7
+//                                              ------------
+//
+// General : The program change letters by one depends on situation.
+//
+// Input   : 2 letters.
+//
+// Process : The program checks if the first letter is before the second in
+//           the ABC and acts accordingly.
+//
+// Output  : '1' if is it True, '0' is false.
+//
+//---------------------------------------------------------------------------------------
+// Programmer : Cohen Idan
+// Student No : None
+// Date       : 19.09.2019
+//---------------------------------------------------------------------------------------
+void main(void)
+{
+    char a,
+         b,
+         final_a,
+         final_b,
+         opr = '+';
+    
+    printf("Enter 2 chars: ");
+    scanf("%c%c", &a, &b);
+
+    final_a = a + ONE;
+    final_b = b - ONE;
+
+    if (a > b)
+    {
+        final_a -= TWO;
+        final_b += TWO;
+        opr = '-';
+    }
+
+    printf("%c %c %c\n", final_a, opr, final_b);
+}  

3/ex3.c

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+#include <stdio.h>
+
+#define TEN_THOUSAND 10000
+#define ONE_HUNDRED 100
+//---------------------------------------------------------------------------------------
+//                                              Exercise 3
+//                                              ----------
+//
+// General : The program print the date as a sentence.
+//
+// Input   : 1 number.
+//
+// Process : The program take the year, month and day from the input and put in 
+//           a sentence.
+//
+// Output  : A sentence.
+//
+//---------------------------------------------------------------------------------------
+// Programmer : Cohen Idan
+// Student No : None
+// Date       : 19.09.2019
+//---------------------------------------------------------------------------------------
+void main(void)
+{
+    int date,
+        temp_date;
+    short day,
+          month,
+          year;
+    
+    printf("Enter date: ");
+    scanf("%d", &date);
+
+    temp_date = date;
+
+    year = temp_date - (temp_date / TEN_THOUSAND) * TEN_THOUSAND;
+    temp_date /= TEN_THOUSAND;
+
+    month = temp_date - (temp_date / ONE_HUNDRED) * ONE_HUNDRED;
+    temp_date /= ONE_HUNDRED;
+
+    day = temp_date;
+
+    printf("The year is %hd, the month is %hd, and the day is %hd\n", year, month, day);
+
+}

3/ex4.c

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+#include <stdio.h>
+
+#define TEN_THOUSAND 10000
+#define ONE_HUNDRED 100
+#define MONTHS 12
+#define THREE 3
+//---------------------------------------------------------------------------------------
+//                                              Exercise 4
+//                                              ----------
+//
+// General : The program print the period by month in date.
+//
+// Input   : 1 number.
+//
+// Process : The program take the month, and check which belongs to period.
+//
+// Output  : A sentence.
+//
+//---------------------------------------------------------------------------------------
+// Programmer : Cohen Idan
+// Student No : None
+// Date       : 19.09.2019
+//---------------------------------------------------------------------------------------
+void main(void)
+{
+    int date,
+        temp_date;
+    short month;
+    
+    printf("Enter date: ");
+    scanf("%d", &date);
+
+    temp_date = date / TEN_THOUSAND;
+    month = temp_date - (temp_date / ONE_HUNDRED) * ONE_HUNDRED;
+
+    month %= MONTHS;
+    month /= THREE;
+
+    printf("If you got '0' this WINTER \n\
+If you got '1' this SPRING \n\
+If you got '2' this SUMMER \n\
+If you got '3' this AUTUMN \n\
+You got: %hd\n", month);
+}

3/part2.c

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+#define ABS(x) x * (((2 * x) + 1) % 2)
+#define MAX(x, y) ((x+y) + ABS(x-y))/2
+#define TWO 2
+#define THREE 3
+#define ZERO 0
+
+
+// Part 2 exercise 2
+void main(void)
+{
+    short x_king,
+          y_king,
+          x_zariah,
+          y_zariah,
+          answer;
+
+    // If answer == '0' is TRUE, else is FALSE
+    if ((x_king - x_zariah) * (y_king - y_zariah) == ZERO){}
+}
+
+// Part 2 exercise 3
+void main(void)
+{
+    short x_king,
+          y_king,
+          x_runner,
+          y_runner,
+          answer;
+
+    // If answer == '0' is TRUE, else is FALSE
+    if (ABS(x_king - x_runner) - ABS(y_king - y_runner) == ZERO){}
+}
+
+// Part 2 exercise 4
+void main(void)
+{
+    short x_king,
+          y_king,
+          x_horseman,
+          y_horseman,
+          answer;
+
+    // If answer == '0' is TRUE, else is FALSE
+    if (ABS(x_king - x_horseman) + ABS(y_king - y_horseman) - THREE == ZERO){}
+}
+
+// Part 2 exercise 5
+void main(void)
+{
+    short a,
+          b,
+          answer;
+
+    answer = ((a+b) + ABS(a-b))/TWO;
+}