From 61c2b40a1e00107e058af9a671e5c0c3f163911e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kristi=C3=A1n=20Sot=C3=A1k?= <ks625fn@omega.tuke.sk>
Date: Wed, 6 Mar 2019 11:40:48 +0100
Subject: [PATCH] test

---
 program.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 program.c

diff --git a/program.c b/program.c
new file mode 100644
index 0000000..bf25518
--- /dev/null
+++ b/program.c
@@ -0,0 +1,118 @@
+#include <stdio.h>
+
+int main (void)
+{
+    
+    int day,month,year;
+
+    printf("Enter Year, Month and Day as YYYY,M,DD\n");
+
+    scanf("%4d%d%2d", &year, &month, &day);
+
+    if (year >= 1901 && year <= 2299 &&
+        month >= 1 && month <= 12 &&
+        day >= 0 && day <= 31)
+    {
+        int century = year/100;
+
+        switch(century)
+        {
+            case 19:
+                century=0;
+                break;
+            case 20:
+                century=6;
+                break;
+            case 21:
+                century=4;
+                break;
+            case 22:
+                century=2;
+                break;
+        }
+
+        int last2_of_year= year % 100;
+
+        int last2_div_4 =  last2_of_year/4;
+
+        switch (month)
+        {
+            case 1:
+                month=0;
+                break;
+
+            case 2:
+                month=3;
+                break;
+            case 3:
+                month=3;
+                break;
+            case 4:
+                month=6;
+                break;
+            case 5:
+                month=1;
+                break;
+            case 6:
+                month=4;
+                break;
+            case 7:
+                month=6;
+                break;
+            case 8:
+                month=2;
+                break;
+            case 9:
+                month=5;
+                break;
+            case 10:
+                month=0;
+                break;
+            case 11:
+                month=3;
+                break;
+            case 12:
+                month=5;
+                break;
+         }
+
+
+        int total_num = (century+ last2_of_year +day +month +last2_div_4)%7;
+
+        switch (total_num) 
+        {
+            case 0:
+            printf("Sunday");
+                break;
+            case 1:
+            printf("Monday");
+                break;
+            case 2:
+            printf("Tuesday");
+                break;
+            case 3:
+            printf("Wednesday");
+                break;
+            case 4:
+            printf("Thursday");
+                break;
+            case 5:
+            printf("Friday");
+                break;
+            case 6:
+            printf("Saturday");
+                break;
+        }
+
+        printf("%d ,%d, %d, is a %d", year,month,day,total_num);
+        }
+        else
+        {
+            printf("invalid\n");
+        }
+
+
+
+    return 0;
+
+    }