#include"graphics.h" #include"dos.h" #include"stdio.h" #include"math.h" union REGS i,o; char text[35][25]={ "7","8","9","*","4","5","6","/","1","2","3","+","0","00",".","-","M","M+", "M-","+/-","MR","MC","x^2","sr","OFF","AC","CE","="}; int s=0,k=0,pass,op,prop,newnum=1,bt,memo=1,d=0,sq; long double num=0,accum,m; void normalbutton(int,int,int,int,char *); void main() { int gd=DETECT,gm,x1,x2,y1,y2,i,j,maxx,maxy,x,y,button; initgraph(&gd,&gm,""); if(initmouse()==0) { closegraph(); restorecrtmode(); printf(" Mouse driver not loded"); exit(1); } setcolor(2); gotoxy(20,10); printf("WELCOME TO ISTE "); gotoxy(20,14); printf("press any key to continue....... "); getch(); cleardevice(); showmouseptr(); movemouseptr(&x,&y); setcolor(15); rectangle(198,140,417,163); rectangle(199,141,418,164); rectangle(197,139,416,162); rectangle(185,130,430,450); rectangle(184,129,431,451); rectangle(182,127,433,454); rectangle(181,126,434,453); setfillstyle(SOLID_FILL,3); //bar(200,142,415,161); outtextxy(50,25,"A Calculator project in C presented by B.NARAYANA MOORTHY AND R.KARTHIK KEYAN"); outtextxy(200,100,"Press OFF button to exit...."); y1=140; y2=160; for(j=0;j<7;j++) { x1=200; x2=235; y1+=40; y2+=40; for(i=0;i<4;i++) { normalbutton(x1,x2,y1,y2,text[s]); s++; x1+=60; x2+=60; } } while(1) { getmousepos(&button,&x,&y); y1=140; y2=160; for(j=0;j<7;j++) { x1=200; x2=235; y1+=40; y2+=40; for(i=0;i<4;i++) { if((x<x2&&x>x1)&&(y<y2&&y>y1)) { if((button&1)==1) { gotoxy(28,10); bt=j*4+i; setcolor(11); outtextxy(x1+12,y1+7,text[j*4+i]); if(num>pow(10.0,18)) exit(); delay(10); delay(250); delay(10); switch (bt) { case 8 : addnum(1); break; case 9 : addnum(2); break; case 10 : addnum(3); break; case 4 : addnum(4); break; case 5 : addnum(5); break; case 6 : addnum(6); break; case 0 : addnum(7); break; case 1 : addnum(8); break; case 2 : addnum(9); break; case 12 : addnum(0); break; case 11 : operation(1); // plus break; case 15 : operation(2); // minus break; case 3 : operation(3); // multiplication break; case 7 : operation(4); // division break; case 13: doublezero(); break; case 14 : decimal(); break; case 16: m=m; printf("%25.5Lf",m); //memory call break; case 20: printf("%25.5Lf",m); break; case 19: plusminus(); break; case 17: m=m+num; //memory plus break; case 18: m=m-num; //memory minus break; case 21: clearm(); break; case 22 : square(); break; case 23: sqroot(); break; case 24: hidemouseptr(); setcolor(1); cleardevice(); setcolor(14); outtextxy(225,200,"THANK YOU"); delay(2000); exit(); break; case 25: allclear(); break; case 26: clear(); break; case 27: num=operation(5); // equalto break; } setcolor(1); outtextxy(x1+12,y1+7,text[j*4+i]); } } x1+=60; x2+=60; } } } } void normalbutton(int x1,int x2,int y1,int y2,char *text) { setcolor(15); rectangle(x1-2,y1-2,x2+1,y2+1); rectangle(x1-1,y1-1,x2+2,y2+2); setcolor(5); rectangle(x1,y1,x2+2,y2+2); rectangle(x1,y1,x2+1,y2+1); setfillstyle(SOLID_FILL,14); bar(x1,y1,x2,y2); setcolor(1); outtextxy(x1+12,y1+7,text); k++; } initmouse() { i.x.ax=0; int86 (0x33,&i,&o); return(o.x.ax); } hidemouseptr() { i.x.ax=2; int86(0x33,&i,&o); return 0; } showmouseptr() { i.x.ax=1; int86(0x33,&i,&o); return 0; } getmousepos(int *button,int *x,int *y) { i.x.ax=3; int86(0x33,&i,&o); *button=o.x.bx; *x=o.x.cx; *y=o.x.dx; return 0; } /* Move mouse ptr to x,y */ movemouseptr(int *x,int *y) { i.x.ax=4; int86(0x33,&i,&o); o.x.cx=*x; o.x.dx=*y; return 0; } addnum(int pass) { if(sq) newnum=1; if(newnum) { if(d) { num=pass/(pow(10.0,d)); d++; newnum=0; } else { num=pass; newnum=0; } } else { if(d) { if(num<0) num=num-pass/(pow(10.0,d)); else num=num+pass/(pow(10.0,d)); d++; } else { num=num*10+pass; } } printf("%25.5Lf",num); return ; } operation(int opr) { long double pnum; pnum=num; if(newnum && (prop != 5) && memo) { } else { newnum=1; d=0; sq=0; switch(prop) { case 1: accum=accum+pnum; break; case 2: accum=accum-pnum; break; case 3: accum=accum*pnum; break; case 4: accum=accum/pnum; break; default: accum=pnum; } } prop=opr; num=accum; printf("%25.5Lf",num); return num; } allclear() { sq=0; accum=0; num=0; d=0; newnum=1; printf("%25.5Lf",num); return; } plusminus() { if(num!=0) { num*=-1; printf("%25.5Lf",num); } return; } clearm() { m=0; //printf("%25.5Lf",m); return; } decimal() { if(!d) { d=1; if(newnum==1) { num=0; } printf("%25.5Lf",num); } return; } square() { sq=1; num*=num; printf("%25.5Lf",num); return; } sqroot() { sq=1; num=pow(num,0.5); printf("%25.5Lf",num); return; } doublezero() { if(d) { d++; d++; } else num*=100; printf("%25.5Lf",num); return; } clear() { num=0; printf("%25.5Lf",num); return; }
Friday, 6 May 2016
A simple Calculator Application
Customer Billing System
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void input();
void writefile();
void search();
void output();
struct date{
int month;
int day;
int year;
};
struct account {
int number;
char name[100];
int acct_no;
float mobile_no;
char street[100];
char city[100];
char acct_type;
float oldbalance;
float newbalance;
float payment;
struct date lastpayment;
}customer;
int tl,sl,ts;
void main()
{
int i,n;
char ch;
clrscr();
_setcursortype(_NOCURSOR);
printf(" CUSTOMER BILLING SYSTEM:\n\n");
printf("===============================\n");
printf("\n1: to add account on list\n");
printf("2: to search customer account\n");
printf("3: exit\n");
printf("\n================================\n");
do{
printf("\nselect what do you want to do?");
ch=getche();
}while(ch<='0' || ch>'3');
switch(ch){
case '1':
clrscr();
printf("\nhow many customer accounts?");
scanf("%d",&n);
for(i=0;i<n;i++){
input();
if(customer.payment>0)
customer.acct_type=(customer.payment<0.1*customer.oldbalance)? 'O': 'D';
else
customer.acct_type=(customer.oldbalance>0)?'D' : 'C';
customer.newbalance=customer.oldbalance - customer.payment;
writefile();
}
main();
case '2':
clrscr();
printf("search by what?\n");
printf("\n1 --- search by customer number\n");
printf("2 --- search by customer name\n");
search();
ch=getche();
main();
case '3':
clrscr();
delay(700);
textcolor(BLUE);
gotoxy(25,25);
cprintf("\nA PROJECT BY VARUN");
delay(1500);
exit(1);
}
}
void input()
{
FILE *fp=fopen("bidur.dat","rb");
fseek (fp,0,SEEK_END);
tl=ftell(fp);
sl=sizeof(customer);
ts=tl/sl;
fseek(fp,(ts-1)*sl,SEEK_SET);
fread(&customer,sizeof(customer),1,fp);
printf("\ncustomer no:%d\n",++customer.number);
fclose(fp);
printf(" Account number:");
scanf("%d",&customer.acct_no);
printf("\n Name:");
scanf("%s",customer.name);
printf("\n mobile no:");
scanf("%f",&customer.mobile_no);
printf(" Street:");
scanf("%s",customer.street);
printf(" City:");
scanf("%s",customer.city);
printf(" Previous balance:");
scanf("%f",&customer.oldbalance);
printf(" Current payment:");
scanf("%f",&customer.payment);
printf(" Payment date(mm/dd/yyyy):");
scanf("%d/%d/%d",&customer.lastpayment.month,&customer.lastpayment.day,&customer.lastpayment.year);
return;
}
void writefile()
{
FILE *fp;
fp=fopen("bidur.dat","ab");
fwrite(&customer,sizeof(customer),1,fp);
fclose(fp);
return;
}
void search()
{
char ch;
char nam[100];
int n,i,m=1;
FILE *fp;
fp=fopen("bidur.dat","rb");
do{
printf("\nenter your choice:");
ch=getche();
}while(ch!='1' && ch!='2');
switch(ch){
case '1':
fseek(fp,0,SEEK_END);
tl=ftell(fp);
sl=sizeof(customer);
ts=tl/sl;
do{
printf("\nchoose customer number:");
scanf("%d",&n);
if(n<=0 || n>ts)
printf("\nenter correct\n");
else{
fseek(fp,(n-1)*sl,SEEK_SET);
fread(&customer,sl,1,fp);
output();
}
printf("\n\nagain?(y/n)");
ch=getche();
}while(ch=='y');
fclose(fp);
break;
case '2':
fseek(fp,0,SEEK_END);
tl=ftell(fp);
sl=sizeof(customer);
ts=tl/sl;
fseek(fp,(ts-1)*sl,SEEK_SET);
fread(&customer,sizeof(customer),1,fp);
n=customer.number;
do{
printf("\nenter the name:");
scanf("%s",nam);
fseek(fp,0,SEEK_SET);
for(i=1;i<=n;i++)
{
fread(&customer,sizeof(customer),1,fp);
if(strcmp(customer.name,nam)==0)
{
output();
m=0;
break;
}
}
if(m!=0)
printf("\n\ndoesn't exist\n");
printf("\nanother?(y/n)");
ch=getche();
}while(ch=='y');
fclose(fp);
}
return;
}
void output()
{
printf("\n\n Customer no :%d\n",customer.number);
printf(" Name :%s\n",customer.name);
printf(" Mobile no :%.f\n",customer.mobile_no);
printf(" Account number :%d\n",customer.acct_no);
printf(" Street :%s\n",customer.street);
printf(" City :%s\n",customer.city);
printf(" Old balance :%.2f\n",customer.oldbalance);
printf(" Current payment:%.2f\n",customer.payment);
printf(" New balance :%.2f\n",customer.newbalance);
printf(" Payment date :%d/%d/%d\n\n",customer.lastpayment.month,customer.lastpayment.day,customer.lastpayment.year);
printf(" Account status :");
textcolor(128+RED);
switch(customer.acct_type)
{
case 'C':
cprintf("CURRENT\n\n");
break;
case 'O':
cprintf("OVERDUE\n\n");
break;
case 'D':
cprintf("DELINQUENT\n\n");
break;
default:
cprintf("ERROR\\n\n");
}
textcolor(GREEN);
return;
}
#include<conio.h>
#include<stdlib.h>
void input();
void writefile();
void search();
void output();
struct date{
int month;
int day;
int year;
};
struct account {
int number;
char name[100];
int acct_no;
float mobile_no;
char street[100];
char city[100];
char acct_type;
float oldbalance;
float newbalance;
float payment;
struct date lastpayment;
}customer;
int tl,sl,ts;
void main()
{
int i,n;
char ch;
clrscr();
_setcursortype(_NOCURSOR);
printf(" CUSTOMER BILLING SYSTEM:\n\n");
printf("===============================\n");
printf("\n1: to add account on list\n");
printf("2: to search customer account\n");
printf("3: exit\n");
printf("\n================================\n");
do{
printf("\nselect what do you want to do?");
ch=getche();
}while(ch<='0' || ch>'3');
switch(ch){
case '1':
clrscr();
printf("\nhow many customer accounts?");
scanf("%d",&n);
for(i=0;i<n;i++){
input();
if(customer.payment>0)
customer.acct_type=(customer.payment<0.1*customer.oldbalance)? 'O': 'D';
else
customer.acct_type=(customer.oldbalance>0)?'D' : 'C';
customer.newbalance=customer.oldbalance - customer.payment;
writefile();
}
main();
case '2':
clrscr();
printf("search by what?\n");
printf("\n1 --- search by customer number\n");
printf("2 --- search by customer name\n");
search();
ch=getche();
main();
case '3':
clrscr();
delay(700);
textcolor(BLUE);
gotoxy(25,25);
cprintf("\nA PROJECT BY VARUN");
delay(1500);
exit(1);
}
}
void input()
{
FILE *fp=fopen("bidur.dat","rb");
fseek (fp,0,SEEK_END);
tl=ftell(fp);
sl=sizeof(customer);
ts=tl/sl;
fseek(fp,(ts-1)*sl,SEEK_SET);
fread(&customer,sizeof(customer),1,fp);
printf("\ncustomer no:%d\n",++customer.number);
fclose(fp);
printf(" Account number:");
scanf("%d",&customer.acct_no);
printf("\n Name:");
scanf("%s",customer.name);
printf("\n mobile no:");
scanf("%f",&customer.mobile_no);
printf(" Street:");
scanf("%s",customer.street);
printf(" City:");
scanf("%s",customer.city);
printf(" Previous balance:");
scanf("%f",&customer.oldbalance);
printf(" Current payment:");
scanf("%f",&customer.payment);
printf(" Payment date(mm/dd/yyyy):");
scanf("%d/%d/%d",&customer.lastpayment.month,&customer.lastpayment.day,&customer.lastpayment.year);
return;
}
void writefile()
{
FILE *fp;
fp=fopen("bidur.dat","ab");
fwrite(&customer,sizeof(customer),1,fp);
fclose(fp);
return;
}
void search()
{
char ch;
char nam[100];
int n,i,m=1;
FILE *fp;
fp=fopen("bidur.dat","rb");
do{
printf("\nenter your choice:");
ch=getche();
}while(ch!='1' && ch!='2');
switch(ch){
case '1':
fseek(fp,0,SEEK_END);
tl=ftell(fp);
sl=sizeof(customer);
ts=tl/sl;
do{
printf("\nchoose customer number:");
scanf("%d",&n);
if(n<=0 || n>ts)
printf("\nenter correct\n");
else{
fseek(fp,(n-1)*sl,SEEK_SET);
fread(&customer,sl,1,fp);
output();
}
printf("\n\nagain?(y/n)");
ch=getche();
}while(ch=='y');
fclose(fp);
break;
case '2':
fseek(fp,0,SEEK_END);
tl=ftell(fp);
sl=sizeof(customer);
ts=tl/sl;
fseek(fp,(ts-1)*sl,SEEK_SET);
fread(&customer,sizeof(customer),1,fp);
n=customer.number;
do{
printf("\nenter the name:");
scanf("%s",nam);
fseek(fp,0,SEEK_SET);
for(i=1;i<=n;i++)
{
fread(&customer,sizeof(customer),1,fp);
if(strcmp(customer.name,nam)==0)
{
output();
m=0;
break;
}
}
if(m!=0)
printf("\n\ndoesn't exist\n");
printf("\nanother?(y/n)");
ch=getche();
}while(ch=='y');
fclose(fp);
}
return;
}
void output()
{
printf("\n\n Customer no :%d\n",customer.number);
printf(" Name :%s\n",customer.name);
printf(" Mobile no :%.f\n",customer.mobile_no);
printf(" Account number :%d\n",customer.acct_no);
printf(" Street :%s\n",customer.street);
printf(" City :%s\n",customer.city);
printf(" Old balance :%.2f\n",customer.oldbalance);
printf(" Current payment:%.2f\n",customer.payment);
printf(" New balance :%.2f\n",customer.newbalance);
printf(" Payment date :%d/%d/%d\n\n",customer.lastpayment.month,customer.lastpayment.day,customer.lastpayment.year);
printf(" Account status :");
textcolor(128+RED);
switch(customer.acct_type)
{
case 'C':
cprintf("CURRENT\n\n");
break;
case 'O':
cprintf("OVERDUE\n\n");
break;
case 'D':
cprintf("DELINQUENT\n\n");
break;
default:
cprintf("ERROR\\n\n");
}
textcolor(GREEN);
return;
}
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