m

start_end_time.c

+#include<stdio.h>
+#include<stdlib.h>
+
+static int  isleapyear(int year){
+  return (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0));
+}
+
+
+static int getlastday(int year, int month){
+  static int lastday_noleap[]  =  {31,28,31,30,31,30,31,31,30,31,30,31};
+  static int lastday_leap  []  =  {31,29,31,30,31,30,31,31,30,31,30,31};
+  if (isleapyear(year) ) return lastday_leap  [month-1];
+  if (!isleapyear(year)) return lastday_noleap[month-1];
+  return 0;
+}
+
+
+int main(void){
+
+  FILE *file = NULL;
+  file = fopen("start_end.dat","w+");
+  int y1 = 2015;
+  int m1 = 2;
+  int d1 = 16;
+  int y2 = 2016;
+  int m2 = 10;
+  int d2 = 13;
+  int yt = y1, mt = m1;
+  int lastday = 0;
+  int nfirst = 0;
+  if (y1 < y2){
+    while (yt < y2){
+      lastday= getlastday(yt, mt);
+      if (mt == m1 && nfirst == 0){
+	fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",yt, mt,d1,yt, mt,lastday);
+	nfirst = 1;
+      }
+      else if (mt == m1 && nfirst == 1){
+	fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",yt, mt,1,yt, mt,lastday);
+      }
+      else if (mt != m1){
+	fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",yt, mt,1,yt, mt,lastday);
+      }
+      mt++;
+      if (mt > 12) {
+	yt++;
+	mt = 1;
+      }
+    }
+    yt = y2;
+    mt = 1;
+    while (mt < m2){
+      lastday= getlastday(yt, mt);
+      fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",yt, mt,1,yt, mt,lastday);
+      mt++;
+    }
+    mt = m2;
+    lastday = d2;
+    fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",yt, mt,1,yt, mt,lastday);
+  }
+
+  if (y1 == y2){
+    if (m1 < m2){
+      while(mt < m2){
+	lastday= getlastday(y1, mt);
+	fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",y1, mt,1,y1, mt,lastday);
+	mt++;
+      }
+      mt = m2;
+      lastday = d2;
+      fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",y1, mt,1,y1, mt,lastday);
+    }
+  }
+  if (y1 == y2){
+    if (m1 == m2){
+      fprintf(file,"%04d%02d%02d\t%04d%02d%02d\n",y1, m1,d1,y1, m1,d2);
+    }
+  }
+  
+  fclose(file);    
+  
+  return 0;
+}
+