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// Suma de fechas
// (C) 2009 Con Clase
// Salvador Pozo
#include <iostream>
using namespace std;
struct fecha {
int dia;
int mes;
int anno;
};
fecha operator +(fecha, int);
bool bisiesto(int);
int main() {
fecha f1 = { 12, 11, 2009 };
fecha f2;
f2 = f1 + 1485;
cout << "fecha 1: " << f1.dia << "/" << f1.mes << "/" << f1.anno << endl;
cout << "fecha 2: " << f2.dia << "/" << f2.mes << "/" << f2.anno << endl;
return 0;
}
fecha operator +(fecha f1, int d) {
int dm[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
fecha temp = f1;
temp.dia += d;
if(bisiesto(temp.anno)) dm[1] = 29; else dm[1] = 28;
while(temp.dia > dm[temp.mes-1]) {
temp.dia -= dm[temp.mes-1];
temp.mes++;
if(temp.mes > 12) {
temp.mes = 1;
temp.anno++;
if(bisiesto(temp.anno)) dm[1] = 29; else dm[1] = 28;
}
}
return temp;
}
bool bisiesto(int a) {
return !(a%4) && ((a%100) || !(a%400));
}
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