im new at C pls help me debug this program.. tnx

[badrobot]

#include <iostream.h>
#include <stdlib.h>
#include <conio.h>
#include <graphics.h>
#include <iomanip.h>

int i,emonth,eyr,wday,nwday,pmdays,x,y;
unsigned int totaldays;
int monthd[]={31,28,31,30,31,30,31,31,30,31,30,31};
char* 
mname[]={"January","Febraury","March","April","May","June","July","August","september","October","November","December"};
int gm,gd=DETECT,mx,my;
char*cp,*yrp;
int xp,yp,textw,texth,skey;
void display_month();
void monthgraphics();
void monthloop();
void process_date();
void yeargraph();
void yearloop();
/*main starts*/
void main()
{
char choice='v';
initgraph(&gd,&gm,"");
while(choice!='e')
{
cleardevice();
setcolor(1);
rectangle(1,100,639,350);
rectangle(4,102,637,348);
settextstyle(3,0,2);
x=1+textwidth(" ");
y=102+textheight(" ");
setcolor(63);
outtextxy(x,y,"********************************************    ");
y=y+1.5*textheight(" ");
setcolor(60);
outtextxy(x,y,"                                       MENU");
y=y+1.5*textheight(" ");
setcolor(3);
outtextxy(x,y,"1.Enter 1 to get year calender");
y=y+1.5*textheight(" ");
outtextxy(x,y,"2.Enter 2 to get month calender");
y=y+1.5*textheight(" ");
outtextxy(x,y,"3.Enter Eoreto exit");
setcolor(2);
y=y+1.5*textheight(" ");
outtextxy(x,y,"Enter choice          ");
y=y+1.5*textheight(" ");
setcolor(63);
outtextxy(x,y,"     *********************************************");
x=x+textwidth("Enter choice");
y=y-(7.5+textheight(" "));
moveto(x,y+7);
setcolor(2);
outtext("-");
choice=getch();
setcolor(5);
outtextxy(x,y,&choice);
switch(choice)
{
case '1':cout<<"Enter the integer value of year followed by Enter 
key:";
     cin>>eyr;
     yearloop();
     break;
case '2':cout<<"Enter the integer value of year and month";
     cout<<"\n\tYear";
     cin>>eyr;
     cout<<"\tMonth:";
     cin>>emonth;
     monthloop();
     break;
case 'e':break;
default:break;
}
}
closegraph();
}
/*process_data()-starts*/
void process_date()
{
totaldays=eyr*365+((eyr-1)/4);
if(emonth>1)
{
for(i=0;i<emonth-1;i++)
totaldays=totaldays+monthd[i];
}
if((((eyr%4==0)&&(eyr%100!=0))||eyr%400==0)&&(emonth>2))
totaldays++;
wday=totaldays%7;
}
void display_month()
{
xp=x;yp=y+textheight("  ");
setcolor(55);
if(wday>0)
for(i=0;i<wday;i++)
{
textw=textwidth(" ");
outtextxy(xp,yp,"  ");
xp=xp+textw;
}
nwday=wday;
pmdays=monthd[emonth-1];
if((((eyr%4==0)&&(eyr%100!=0))||eyr%400==0)&&(emonth==2))
pmdays++;
for(i=1;i<=pmdays;i++);
{
if(((nwday+1)%8)==0)
{
xp=x;
yp=yp+1.5*textheight(" ");
nwday=0;
}
cp=itoa(i,cp,10);
outtextxy(xp,yp,cp);
xp=xp+textwidth(cp)+(4*textwidth(" ")-textwidth(cp));
nwday++;
}
}
void yeargraph()
{
cleardevice();
setcolor(60);
setbkcolor(55);
settextstyle(3,0,1);
outtextxy(260,5,"YEAR");
setcolor(1);
rectangle(2,2,639,479);
rectangle(4,4,637,477);
setcolor(60);
outtextxy(260+textwidth("YEAR"),6,itoa(eyr,yrp,10));
for(int x1=6,y1=34,x2=200,y2=140,i=0;i<4;i++,y1=y2+5,y2=y2+106)
{setcolor(65);
rectangle(x1,y1,x2,y2);
setcolor(62);
settextstyle(2,0,4);
outtextxy(x1+2,y1+2,mname[i]);
setcolor(2);
outtextxy(x1+2,y1+10,"Sun Mon Tue Wed Thu Fri Sat");
process_date();
x=x1+2;
y=y1+12;
display_month();
emonth++;
}
for(x1=210,y1=34,x2=420,y2=140,i=4;i<8;i++,y1=y2+5,y2=y2+106)
{
setcolor(1);
rectangle(x1,y1,x2,y2);
setcolor(62);
settextstyle(2,0,4);
outtextxy(x1+2,y1+2,mname[i]);
setcolor(2);
outtextxy(x1+2,y1+10,"Sun Mon Tue Wed Thu Fri Sat");
process_date();
x=x1+2;
y=y1+12;
display_month();
emonth++;
}
for(x1=430,y1=34,x2=634,y2=140,i=8;i<12;i++,y1=y2+5,y2=y2+106)
{
setcolor(1);
rectangle(x1,y1,x2,y2);
setcolor(62);
settextstyle(2,0,4);
outtextxy(x1+2,y1+2,mname[i]);
setcolor(2);
outtextxy(x1+2,y1+10,"Sun Mon Tue Wed Thu Fri Sat");
process_date();
x=x1+2;
y=y1+12;
display_month();
emonth++;
}
setcolor(2);
settextstyle(2,0,6);
outtextxy(8,454,"Esc->Mainmenu,AQrrow Keys:UP->previous and 
Down->next");
setcolor(6);
settextstyle(5,1,2);
outtextxy(600,40,"CREATED BY HARINATH");
}
void monthgraphics()
{
char *mcp;
cleardevice();
int x1=1,y1=1,x2=639,y2=479;
setcolor(65);
rectangle(x1,y1,x2,y2);
rectangle(x1+2,y1+2,x2-2,y2-2);
setcolor(62);
settextstyle(1,0,5);
int xt=x1+200;
outtextxy(xt,y1+4,mname[emonth-1]);
xt=xt+textwidth(" ")+textwidth(mname[emonth-1]);
outtextxy(xt,y1+4,itoa(eyr,mcp,10));
setcolor(65);
line(2,y1+12+textheight(" "),637,y1+12+textheight(" "));
line(2,y1+14+textheight(" "),637,y1+14+textheight(" "));
setcolor(2);
settextstyle(1,0,3);
outtextxy(x1+4,y1+50,"Sun     Mon    Tue     Wed     Thu     Fri      
Sat");
process_date();
x=x1+10;
y=y1+50;
xp=x;yp=y+2*textheight(" ");
setcolor(55);
if(wday>0);
for(i=0;i<wday;i++)
{
textw=textwidth(" ");
outtextxy(xp,yp," ");
xp=xp+textw;
}
nwday=wday;
pmdays=monthd[emonth-1];
if(((eyr%4)==0)&&(emonth==2))
pmdays++;
for(i=1;i<=pmdays;i++)
{
if(((nwday+1)%8)==0)
{
xp=x;
yp=yp+1.5*textheight("{ ");
nwday=0;
}
cp=itoa(i,cp,10);
settextstyle(1,0,5);
outtextxy(xp,yp,cp);
xp=xp+textwidth(cp)+(4.5*textwidth(" ")-textwidth(cp));
nwday++;
}
setcolor(1);
line(2,446,637,446);
line(2,448,637,448);
setcolor(2);
settextstyle(2,0,6);
outtextxy(6,450,"Esc->mainmenuArrow Keys:Up->previous and Down->next");
setcolor(6);
settextstyle(5,0,2);
outtextxy(200,400,"CREATED BY HARINATH");
}
void monthloop()
{
monthgraphics();
while((skey=getch())!=27)
{
switch(skey)
{
case 80:if(emonth>=12)
    {
    emonth=1;
    eyr++;
    }
    else
    {emonth++;
    }
    monthgraphics();
    break;
case 72:if(emonth<=1)
    {
     emonth=12;
     eyr--;
     }
     else
     {
     emonth--;
     }
     monthgraphics();
     break;
default:break;
}}}
void yearloop()
{emonth=1;
yeargraph();
while((skey=getch())!=27)
{
switch(skey)
{
case 80:if(eyr>=32678)
    {
    eyr=1;
    }
    else
    {
    eyr++;
    }
    emonth=1;
    yeargraph();
    break;
case 72:if(eyr<=1)
    {
    eyr=1;
    }
    else
    {
    eyr--;
    }
    emonth=1;
    yeargraph();
    break;
default:break;
}}}

[WolfPack]

First debug it part by part and localize the error. Without knowing what is expected for the output, we are not in the position to debug all that long code. So you will be better off doing it yourself.

You should have compiled and tested it part by part in the first place, while writing that code. Compiling once after writing all that code, and then dumping the code into a IT forum is not the way to be a programmer.

[Rashakil Fol]

If you want people to help you, you're better off isolating the problem and identifying what you don't understand. Using nonstandard header files that only work on obscure compilers isn't increasing the probability of people finding your problem, either.

I recommend that you take a more proactive stance towards avoiding mistakes. In particular, write your code in a more clear fashion. Match your braces' indentation levels; don't stack closing braces all on one line. Don't use magical numeric constants, and avoid monstrosities like for(x1=210,y1=34,x2=420,y2=140,i=4;i<8;i++,y1=y2+5,y2=y2+106) Can you really understand what this is doing? If so, then you're too smart, and you need to treat yourself like a dumb person when writing code. Incomprehensibilitude is best left for writers of tax law.

[iamthwee]

Programming is not about who can display the most colours in the console window. When you realise this then you might actually write something useful.

[adotl]

Programming is not about who can display the most colours in the console window. When you realise this then you might actually write something useful.

Harsh but true.