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  1. #include <iostream>
  2.  
  3. using namespace std ;
  4.  
  5. class myDate
  6. {
  7. 	public :
  8. 		myDate() ;
  9. 		myDate(int X) ;
  10. 		myDate( int year, int month, int day) ;
  11. 		int dayOfYear() ;
  12. 		bool isLeap(int year) ;
  13. 		int Year() ;
  14. 		int Month() ;
  15. 		int Day() ;
  16. 		friend const int operator -(const myDate& day1 , const myDate& day2) ;	
  17. 	private :	
  18. 		int YEAR ;
  19. 		int MONTH ;
  20. 		int DAY ;
  21. 		int A ;	
  22. } ;
  23.  
  24. int main()
  25. {
  26. 	myDate D1() , D2(2015,12,31) , D3(2016,3,1) ;
  27.  
  28. 	int X ;
  29.  
  30. 	X = D2 - D3 ;
  31.  
  32. 	cout<<"D2 : "<<D2.dayOfYear()<<endl ;
  33.  
  34. 	cout<<"D3 : "<<D3.dayOfYear()<<endl ;
  35.  
  36. 	cout<<endl<<X ;	
  37. }
  38.  
  39. myDate::myDate() : YEAR(0) , MONTH(0) , DAY(0) 
  40. {}
  41.  
  42. myDate::myDate( int year, int month, int day) : YEAR(year) , MONTH(month) , DAY(day) 
  43. {}
  44.  
  45. int myDate::Day()
  46. {
  47. 	return DAY ;
  48. }
  49.  
  50. bool myDate::isLeap(int year)  
  51. {
  52.      if( year % 400 == 0 )
  53.           return 1 ;
  54.      else if( year % 4 == 0 && year % 100 != 0 )
  55.           return 1 ;
  56.      else
  57.           return 0 ;
  58. }
  59.  
  60. int myDate::dayOfYear()
  61. {
  62. 	int x = 0 ;
  63.  
  64. 	switch(MONTH-1)
  65. 	{
  66. 		case 12 : x+=31 ; 
  67. 		case 11 : x+=30 ;
  68. 		case 10 : x+=31 ;
  69. 		case 9 : x+=30 ;
  70. 		case 8 : x+=31 ;
  71. 		case 7 : x+=31 ;
  72. 		case 6 : x+=30 ;
  73. 		case 5 : x+=31 ;
  74. 		case 4 : x+=30 ;
  75. 		case 3 : x+=31 ;
  76. 		case 2 : 
  77. 		{
  78. 			if(isLeap(YEAR) == true)
  79. 				x+=29 ;
  80. 			if(isLeap(YEAR) == false)
  81. 				x+=28 ;	
  82. 		}
  83. 		case 1 : x+=31 ;
  84. 	} 
  85.  
  86. 		x=x+DAY ;
  87.  
  88. 		return x ;		
  89. }
  90.  
  91. const int operator -(const myDate& day1 ,  const myDate& day2)
  92. {
  93. 	myDate DATE ;
  94.  
  95. 	int x,y,z,LeaPz = 0 ;
  96.  
  97. 	int i ;
  98.  
  99. 	int X ;
  100.  
  101. 	x = day1.dayOfYear() ;
  102. 	y = day2.dayOfYear() ;
  103.  
  104. 	if( day1.YEAR == day2.YEAR )
  105. 	{
  106. 		X = x-y ;
  107. 		if(X < 0)
  108. 			X = -X ;
  109. 	}
  110.  
  111. 	if( day1.YEAR - day2.YEAR > 0 )
  112. 	{
  113. 		z = day1.YEAR - day2.YEAR - 1 ;
  114.  
  115. 		for( i = day2.YEAR ; i < day1.YEAR ; i++ )
  116. 		{
  117. 			if( DATE.isLeap(i) ==1 )
  118. 				LeaPz ++ ; 	
  119. 		}
  120.  
  121. 		if(DATE.isLeap(day2.YEAR) ==1 )
  122. 			X = (366-y) + x + 365*(z-LeaPz) + 366*LeaPz ;
  123.  
  124. 		else
  125. 			X = (365-y) + x + 365*(z-LeaPz) + 366*LeaPz ;	
  126. 	}
  127.  
  128. 	if( day1.YEAR - day2.YEAR < 0 )
  129. 	{
  130. 		z = day2.YEAR - day1.YEAR - 1 ;
  131.  
  132. 		for( i = day1.YEAR ; i < day2.YEAR ; i++ )
  133. 		{
  134. 			if( DATE.isLeap(i) ==1 )
  135. 				LeaPz ++ ; 	
  136. 		}
  137.  
  138. 		if(DATE.isLeap(day1.YEAR) == 1 )
  139. 			X = (365-x) + y + 365*(z-LeaPz) + 366*LeaPz ; 
  140.  
  141. 		else
  142. 			X = (365-x) + y + 365*(z-LeaPz) + 366*LeaPz ;	
  143. 	}
  144. 	return X ;	
  145. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp: In function 'const int operator-(const myDate&, const myDate&)':
prog.cpp:101:21: error: passing 'const myDate' as 'this' argument of 'int myDate::dayOfYear()' discards qualifiers [-fpermissive]
  x = day1.dayOfYear() ;
                     ^
prog.cpp:102:21: error: passing 'const myDate' as 'this' argument of 'int myDate::dayOfYear()' discards qualifiers [-fpermissive]
  y = day2.dayOfYear() ;
                     ^
stdout 
Standard output is empty
https://ideone.com/BNMlxw
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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