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5/ex1.c

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+#include <stdio.h>
+#include "IdanLib.c"
+
+
+int DifferentDates2(int date1, int date2)
+{
+    int temp_date1 = date1,
+        temp_date2 = date2,
+        new_date = 0;
+    short days_date1,
+          days_date2,
+          months_date1,
+          months_date2;
+    BOOLEAN negative;
+    
+    days_date1 = temp_date1 % 100;
+    days_date2 = temp_date2 % 100;
+    temp_date1 /= 100;
+    temp_date2 /= 100;
+    months_date1 = temp_date1 % 100;
+    months_date2 = temp_date2 % 100;
+    temp_date1 /= 100;
+    temp_date2 /= 100;
+
+    days_date1 -= days_date2;
+    months_date1 -= months_date2;
+    temp_date1 -= temp_date2;
+
+    negative = (months_date1 < 0);
+    months_date1 += (negative * 12);
+    temp_date1 += (negative * -1);
+
+    negative = (days_date1 < 0);
+    days_date1 += (negative * 30);
+    months_date1 += (negative * -1);
+
+    negative = TAKE_SIGNED(temp_date1);
+
+    new_date = temp_date1;
+    new_date *= 100;
+    new_date += (months_date1 * (signed short)negative);
+    new_date *= 100;
+    new_date += (days_date1 * (signed short)negative);
+
+    return (new_date);
+
+}
+
+
+void main(void)
+{
+    int date1, date2, new_date;
+    printf("Enter 2 dates (yymmdd): ");
+    scanf("%d%d", &date1, &date2);
+    new_date = DifferentDates2(date1, date2);
+    printf("%d\n", new_date);
+
+}