11 | 7 | sharafat

solutions/sharafat/11/5.c

@@ -37,17 +37,17 @@ int validate_data_and_return(struct date date)
 {
     if (date.year < 1)
     {
-        printf("Invalid year\n");
+        // printf("Invalid year\n");
         return(1);
     }
     if (date.month < 1 || date.month > 12)
     {
-        printf("Invalid month\n");
+        // printf("Invalid month\n");
         return(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");
+        // printf("Invalid day\n");
         return(1);
     }
     return(0);

solutions/sharafat/11/6.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+struct date 
+{
+    int day;
+    int month;
+    int year;
+};
+
+void input_date(struct date *date)
+{
+    printf("Enter date in YYYYMMDD format: ");
+    scanf("%4d%2d%2d", &date->year, &date->month, &date->day);
+}
+
+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);
+    }
+}
+
+void print_date(struct date *date)
+{
+    printf("Date: %d/%d/%d\n", date->day, date->month, date->year);
+}
+
+int main()
+{
+    struct date date;
+    input_date(&date);
+    validate_data(&date);
+    print_date(&date);
+    return 0;
+}

solutions/sharafat/11/7.c

@@ -0,0 +1,105 @@
+#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 validate_data_and_return(struct date date)
+{
+    if (date.year < 1)
+    {
+        // printf("Invalid year\n");
+        return(1);
+    }
+    if (date.month < 1 || date.month > 12)
+    {
+        // printf("Invalid month\n");
+        return(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");
+        return(1);
+    }
+    return(0);
+}
+
+void update(struct date *date)
+{
+    struct date temp_date = *date;
+    temp_date.day++;
+    if (validate_data_and_return(temp_date))
+    {
+        temp_date.day = 1;
+        temp_date.month++;
+        if (validate_data_and_return(temp_date))
+        {
+            temp_date.month = 1;
+            temp_date.year++;
+            if (validate_data_and_return(temp_date))
+            {
+                printf("Invalid date\n");
+                exit(1);
+            }
+        }    
+    }
+    *date = temp_date;
+}
+
+void nextdate(struct date *date)
+{
+    int days_to_add = 1;
+    printf("Enter number of days to add: ");
+    scanf("%d", &days_to_add);
+    for (int i = 0; i < days_to_add; i++)
+    {
+        update(date);
+    }
+}
+
+void print_date(struct date *date)
+{
+    printf("Date: %d/%d/%d\n", date->day, date->month, date->year);
+}
+
+int main()
+{
+    struct date date;
+    input_date(&date);
+    validate_data(&date);
+    print_date(&date);
+
+    nextdate(&date);
+    printf("Date after incrementing day: \n");
+    print_date(&date);
+    return 0;
+}