11 | 8 | sharafat

solutions/sharafat/11/8.c

@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+struct date 
+{
+    int day;
+    int month;
+    int year;
+};
+
+void input_date(struct date *date)
+{
+    printf("Enter date in DD/MM/YYYY format: ");
+    scanf("%d/%d/%d", &date->day, &date->month, &date->year);
+}
+
+void validate_data(struct date *date)
+{
+    if (date->year < 1)
+    {
+        printf("Invalid year\n");
+        exit(1);
+    }
+    if (date->month < 1 || date->month > 12)
+    {
+        printf("Invalid month\n");
+        exit(1);
+    }
+    if ((date->day < 1 || date->day > 31) || (date-> day > 30 && (date->month == 4 || date->month == 6 || date->month == 9 || date->month == 11)) || (date->day > 28 && date->month == 2) || (date->day > 29 && date->month == 2 && (date->year % 4 != 0 || (date->year % 100 == 0 && date->year % 400 != 0))))
+    {
+        printf("Invalid day\n");
+        exit(1);
+    }
+}
+
+int compare_two_date(struct date *one, struct date *two)
+{
+    if (one->year > two->year)
+    {
+        return(1);
+    }
+    else if (one->year < two->year)
+    {
+        return(0);
+    }
+    else
+    {
+        if (one->month > two->month)
+        {
+            return(1);
+        }
+        else if (one->month < two->month)
+        {
+            return(0);
+        }
+        else
+        {
+            if (one->day > two->day)
+            {
+                return(1);
+            }
+            else if (one->day < two->day)
+            {
+                return(0);
+            }
+            else
+            {
+                return(0);
+            }
+        }
+    }
+}
+
+void print_date(struct date *date)
+{
+    printf("Date: %d/%d/%d\n", date->day, date->month, date->year);
+}
+
+int main()
+{
+    struct date date1, date2;
+    input_date(&date1);
+    validate_data(&date1);
+
+    input_date(&date2);
+    validate_data(&date2);
+
+    if (!compare_two_date(&date1, &date2))
+    {
+        printf("Earlier date: ");
+        print_date(&date1);
+    }
+    else
+    {
+        printf("Earlier date: ");
+        print_date(&date2);
+    }
+    return 0;
+}