Hi every one. it is my solution. if it is false, reply. using Turbo C
#include<iostream.h>
#include<stdio.h>
#include<conio.h>
struct Date
{
int y;
int m;
int d;
void subdates(Date, Date);
long int calculate_date( Date);
long int setvalue(int, int , int);
};
Date t;
void main()
{ clrscr();
Date e,d;
cout<<endl<<"first year: ";
cin>>e.y;
cout<<"first month: ";
cin>>e.m;
cout<<"first day: ";
cin>>e.d;
d.setvalue(1989,5,18);
t.subdates(e,d);
getch();
}
void Date::subdates(Date e, Date d)
{
long int dd, cc, diff;
dd=calculate_date(e);
cc=calculate_date(d);
diff=dd-cc;
cout<< "Zoruu: "<<diff<<endl<<dd;
}
long int Date::setvalue(int y1=1, int m1=1, int d1=1)
{
y=y1;
m=m1;
d=d1;
}
long int Date:: calculate_date(Date d)
{long int z=0,a=0,i;
if(d.y==1)
{ z=0;
switch(d.m)
{
case 1: a=0; break;
case 2: a=31; break;
case 3: a=59; break;
case 4: a=90; break;
case 5: a=120; break;
case 6: a=151; break;
case 7: a=181; break;
case 8: a=212; break;
case 9: a=243; break;
case 10: a=273; break;
case 11: a=304; break;
case 12: a=334; break;
}
}
else {
for(i=2; i<d.y; i++)
{
if(i%400==0)
{
z=z+366;
}
else{
if(i%100==0)
{
z=z+365;
}
else{
if(i%4==0)
{
z=z+366;
}
else z=z+365;
}
}
}
switch(d.m)
{
case 1: a=0; break;
case 2: a=31;
case 3: if(d.y%400==0)
{
a=60;
}
else {
if(d.y%100==0)
{
a=59;
}
else {
if(d.y%4==0)
{
a=60;
}
else a=59;
}
}; break;
case 4: if(d.y%400==0)
{
a=91;
}
else {
if(d.y%100==0)
{
a=90;
}
else {
if(d.y%4==0)
{
a=91;
}
else a=90;
}
}; break;
case 5: if(d.y%400==0)
{
a=121;
}
else {
if(d.y%100==0)
{
a=120;
}
else {
if(d.y%4==0)
{
a=121;
}
else a=120;
}
}; break;
case 6: if(d.y%400==0)
{
a=152;
}
else {
if(d.y%100==0)
{
a=151;
}
else {
if(d.y%4==0)
{
a=152;
}
else a=151;
}
}; break;
case 7: if(d.y%400==0)
{
a=182;
}
else {
if(d.y%100==0)
{
a=181;
}
else {
if(d.y%4==0)
{
a=182;
}
else a=181;
}
}; break;
case 8: if(d.y%400==0)
{
a=213;
}
else {
if(d.y%100==0)
{
a=212;
}
else {
if(d.y%4==0)
{
a=213;
}
else a=212;
}
}; break;
case 9: if(d.y%400==0)
{
a=244;
}
else {
if(d.y%100==0)
{
a=243;
}
else {
if(d.y%4==0)
{
a=244;
}
else a=243;
}
}; break;
case 10: if(d.y%400==0)
{
a=274;
}
else {
if(d.y%100==0)
{
a=273;
}
else {
if(d.y%4==0)
{
a=274;
}
else a=273;
}
}; break;
case 11: if(d.y%400==0)
{
a=305;
}
else {
if(d.y%100==0)
{
a=304;
}
else {
if(d.y%4==0)
{
a=305;
}
else a=304;
}
}; break;
case 12: if(d.y%400==0)
{
a=335;
}
else {
if(d.y%100==0)
{
a=334;
}
else {
if(d.y%4==0)
{
a=335;
}
else a=334;
}
}; break;
default: cout<<"error"<<endl;
}
}
z= z+a+d.d;
return z;
}
