I solved your project syntax, but alghoritm not correct
// EasterProject
#include<iostream>
using namespace std;
int main()
{
int intyear, intEasterDate, intEasterMonth;
int a, b, c, d, e, f, g, h, i, j, k, m, p;
do {
cout<< "What's the year? \n";
cin>> intyear;
cout<<"Easter Month is \n";
if (intyear<0001||intyear>5000)
{ cout<<"This calculator cannot serve you\n";
return -1; }
a=intyear%19;
b=intyear/100;
c=intyear%100;
d=b/4;
e=b%4;
f=(b+8)/25;
g=(b-f+1)/3;
h=((19*a)+b-d-g+15)%30;
i=c/4;
j=c%4;
k=(32+(2*e)+(2*i)-h-j)%7;
m=(a+(11*h)+(22*k))/451;
intEasterMonth=(h+k-(7*m)+114)/31;
p=(h+k-(7*m)+114)%31;
intEasterDate=p+1;
cout << intEasterMonth << "." << intEasterDate << "\n\n";
} while (intyear>=0001&&intyear<=5000);
return 0;
}