int main() {
int choice1, choice2, choice3, choice4, ch;
char pw[20];
char name[20], contact[11], e_mail[120], city[20], dist[20], pin[10], state[30], admdate[20];
int attendance[12][31], p = 0, a = 0, b = 0, charge = 0, n = 0;
unsigned int id, rmn, mnth, dt;
// date admdate;
address addr1;
FILE *ptr;
student s;
while(1) {
logout:
choice1 = printmenu1();
switch(choice1) {
case 1: /*Login*/
choice2 = printmenu2();
switch(choice2) {
case 1: /*Admin*/
printf("Enter password\n");
scanf("%s", pw);
if(strcmp(pw, "lovefood") == 0){
while(1) {
choice3 = printmenu3();
//printf("choice3 is %d", choice3);
switch(choice3) {
case 1: /*Add a student*/
printf("Enter name: ");
getchar();
readline(name, 20);
printf("student id: ");
scanf("%u", &id);
printf("Room no.: ");
scanf("%u", &rmn);
printf("contact no.: ");
getchar();
readline(contact, 11);
printf("Email id: ");
getchar();
readline(e_mail, 128);
printf("Enter date of admission: ");
getchar();
readline(admdate, 20);
//scanf("%d %d %d", &admdate.dd, &admdate.mm,&admdate.yyyy);
printf("city: ");
getchar();
readline(addr1.city, 20);
printf("District: ");
getchar();
readline(addr1.dist, 20);
printf("pincode: ");
getchar();
readline(addr1.pin, 10);
printf("state: ");
getchar();
readline(addr1.state, 30);
addstudent(name, id, rmn, admdate, contact, e_mail, addr1);
break;
case 2: /*Edit a student record*/
printf("Enter the student id whose record you want to edit: ");
scanf("%u",&id);
printf( " 1. Edit student details\n"
" 2. Edit student address \n");
//" 3. Edit student Fee details\n");
scanf("%d", &ch);
switch(ch) {
case 1: /*edit student details*/
printf( " 1. Edit name\n"
" 2. Edit room no.\n"
" 3. Edit contact no\n"
" 4. Edit email id\n");
scanf("%d", &ch);
//" 5. Edit date of admission\n"\
" 6. Edit attendance\n"\);
switch(ch){
case 1:/*edit name*/
printf("Enter the student name: ");
getchar();
readline(name, 20);
printf("ABC");
editname(name, id);
break;
case 2:/*edit room no.*/
printf("Enter room no.: ");
scanf("%u", &rmn);
editroom_no(rmn, id);
break;
case 3:/*edit contact no.*/
printf("Enter contact no.: ");
getchar();
readline(contact, 11);
editcontact(contact, id);
break;
case 4:/*edit email id*/
printf("Enter email: ");
getchar();
readline(e_mail, 128);
editemail(e_mail, id);
break;
default:
printf("Invalid entry");
}
break;
//}
/*case 5:edit date of admission
printf("Enter day,month and year");
scanf("%d %d %d",&d,&m,&y);
editadmissiondate(dt, id);
break;
case 6:edit attendance
printf("Enter absentee or presentee");
scanf("%c",&attendance);
editattendance(attendance, id);
break;
}
*/
case 2:/*edit student address*/
printf( " 1.Edit city\n"
" 2.Edit District\n"
" 3.Edit state\n"
" 4.Edit pincode\n");
scanf("%d", &ch);
switch(ch){
case 1:/*edit city*/
printf("Enter city: ");
getchar();
readline(city, 20);
editcity(city, id);
break;
case 2:/*edit district*/
printf("Enter district: ");
getchar();
readline(dist, 20);
editdistrict(dist, id);
break;
case 3:/*edit state*/
printf("Enter state: ");
getchar();
readline(state, 20);
editstate(state, 20);
break;
case 4:/*edit pincode*/
printf("Enter pincode: ");
getchar();
readline(pin, 10);
editpincode(pin, id);
break;
default:
printf("Invalid entry");
}
break;
}
break;
case 3: /* search for a student */
printf( " 1.search by ID\n"
" 2.search by contact\n"
" 3.search by email\n");
scanf("%d", &ch);
switch(ch){
case 1:/*search by ID*/
printf("Enter ID: \n");
scanf("%u", &id);
searchbyid(id);
break;
case 2:/*search by contact*/
printf("Enter contact: \n");
scanf("%s", contact);
searchbycontact(contact);
break;
case 3:/*search by email*/
printf("Enter email: \n");
scanf("%s", e_mail);
searchbyemail(e_mail);
break;
default:
printf("Invalid entry");
break;
}
break;
case 4: /* mark attendance (initialising attendance to zero)*/
printf("ID of the student: ");
scanf("%u", &id);
printf("month: ");
scanf("%u", &mnth);
markattendance(id, mnth);
printf(" All attendance successfully marked to zero\n");
break;
case 5: /* mark presentee */
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Enter month in number: ");
scanf("%u", &mnth);
printf("date:");
scanf("%u", &dt);
markpresentee(id, mnth, dt);
printf(" Presentee successfully marked\n");
break;
case 6:/* Edit attendance */
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Edit attendance of month: ");
scanf("%u", &mnth);
printf("Edit attendance of date: ");
scanf("%u", &dt);
editattendance(mnth, dt, id);
printf(" Attendance edited successfully\n");
break;
case 7:/*calculate monthly bill*/
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Enter the month: ");
scanf("%u", &mnth);
printf("Charge per meal: ");
scanf("%d", &charge);
printf("No of meals per day: ");
scanf("%d", &n);
p = 0;
p = calpresentdays(id, mnth);
printf("No of present days is %d\n", p);
b = calmonthlybill(p, charge, n);
printf(" Monthly bill is %d ", b);
break;
case 8:/*view student*/
printf("Enter the student ID: ");
scanf("%u", &id);
viewstudent(id);
break;
case 9:/*Logout*/
goto logout;
break;
case 10: /*exit */
return;
default:
("Invalid entry");
break;
}
}
}
else {
printf(" WRONG PASSWORD\n");
break;
}
case 2:/*student*/
printf(" Enter your ID ");
scanf("%u", &id);
ptr = fopen("students", "a+");
if(ptr == NULL) {
printf("Operation failed. Try again.\n");
break;
}
while(fread(&s, sizeof(s), 1, ptr) == 1) {
if(id == s.id && s.id != 0) {
printf("\n ID : %u\n"\
" Name : %s\n"\
" Contact : %s\n", s.id, s.name, s.contact);
while(1) {
choice4 = printmenu4();
switch(choice4) {
case 1: /*view student*/
printf("Enter the student ID: ");
scanf("%u", &id);
viewstudent(id);
break;
case 2: /*view no. of absent days*/
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Month: ");
scanf("%u", &mnth);
a = calabsentdays(id, mnth);
printf("Number of absent days is %d", a);
break;
case 3:/*Logout*/
goto logout;
break;
case 4: /*exit */
exit(0);
break;
default:
printf("Invalid entry");
break;
}
}
}
}
break;
fclose(ptr);
printf(" Invalid ID. Register your ID first. ");
break;
}
case 2:/*create new student id*/
printf(" Enter your Name ");
getchar();
readline(name, 20);
printf(" Enter your contact no ");
readline(contact, 11);
printf(" Enter your ID no ");
scanf("%u", &id);
break;
default:
printf("Invalid entry");
break;
}
}
return 0;
}
int main()
{
int choice, res, no1, no2, ch;
double n, m, s1, s2, res1, ans, val, num;
float x, y;
double result = 0, n1 = 0, fradecimal;
long y1;
char c;
char frabinary[100], hexa[MAX];
long int binaryval;
div_t1 temp;
poly * poly1, * poly2, * poly3;
FILE *fp;
printf("\n\n....NEW USER FIRST READ THE MANUAL TEXT FILE TO UNDERSTANS THE FUNCTIONS USAGE....\n\n");
while(1) {
printmenu1();
printf("Enter your choice\n");
scanf("%d", &ch);
switch(ch) {
case 1:
fp = fopen("Manual.txt", "r");
if(!fp)
printf("Cannot open file\n");
while((c = fgetc(fp) )!= EOF)
printf("%c", c);
fclose(fp);
break;
case 2:
while(1) {
printmenu();
printf("Enter your choice\n");
scanf("%d" ,&choice);
switch(choice) {
case 1:
printf(".....sqrt() function finds the square root of a number.....\n");
printf("Enter your number:\n");
scanf("%lf", &n);
m = sqrt(n); //square root
if( m == 0) {
printf(" You entered negative number\n");
break;
}
printf("square root is %.3lf\n", m);
waita();
break;
case 2:
printf(".....mod() finds remainder when one number is divided by 2nd number.....\n");
printf("enter the number to be divided :\t\n");
scanf("%lf",&s1);
printf("enter the divisor:\t\n");
scanf("%lf",&s2);
ans = fmod(s1, s2); //remainder
printf("remainder is : %lf\n", ans);
waita();
break;
case 3:
printf(".....fabs() finds the absolute value of floating point number.....\n");
printf("Enter the number to find the absolute value\n");
scanf("%lf", &val);
res1 = fabs(val); //absolute value
printf("The absolute value of %lf is %lf\n", val, res1);
waita();
break;
case 4:
printf(".....ceilx() function finds ceil value of a number.....\n");
printf("Enter the value\n");
scanf("%lf", &val);
ans = ceilx(val); //ceil function
printf("Value=%lf\n", ans);
waita();
break;
case 5:
printf(".....floorx() function finds floor value of a number.....\n");
printf("Enter the value\n");
scanf("%lf", &val);
ans = floorx(val); //floor function
printf("Value=%lf\n", ans);
waita();
break;
case 6:
printf(".....expoential() function finds expoential value of a number i.e. e^x.....\n");
printf("Enter the value of x\n");
scanf("%lf", &n);
printf("e^x = %lf\n", exponential(n)); //exponential function
waita();
break;
case 7:
printf(".....hypot()finds the value of hypotenuse when two sides are given.....\n");
printf("Enter sides: \n");
scanf ("%lf %lf",&s1,&s2);
printf("Hypotenus of %f %f is: %f\n", s1, s2,hypot(s1,s2)); //hypotenuse function
waita();
break;
case 8:
printf(".....cbrt() finds the cube root of proper number i.e. cbrt(8)= 2.....\n");
printf("enter the number to find the cube root\n");
scanf("%lf",&n1);
if(n1 < 0) {
printf("enter only +ve integer value\n");
waita();
break;
}
result = cbrtx(n1); //cube root function
if(result)
printf("cube root of %lf is %lf\n",n1,result);
else {
printf("not a proper value for finding the cube root\n");
waita();
break;
}
waita();
break;
case 9:
printf(".....pow() function finds the x^y power.....\n");
printf("Enter the number and the power\n");
scanf("%lf%lf", &s1, &s2);
res1 = Pow(s1, s2); //power function
printf("The %lf^%lf is %lf\n", s1, s2, res1);
waita();
break;
case 10:
printf(".....trunc() function truncates the floating points.....\n");
printf("Enter the value for truncating\n");
scanf("%lf", &s1);
res1 = trunc(s1); // truncating a number
printf("The value after truncating is %lf\n", res1);
waita();
break;
case 11:
printf(".....round() function rounds up a floating point number..... \n");
printf("Enter the value for rounding\n");
scanf("%lf", &s1);
res1 = round(s1); //rounding a number
printf("The value after rounding is %lf\n", res1);
waita();
break;
case 12:
printf(".....abs() function finds absolute value of integer number.....\n");
printf("Enter the integer number to find the absolute value\n");
scanf("%lf", &n);
if(n - (int)n == 0) {
res = abs(n); //absolute value
printf("The absolute value of %lf is %d\n", n, res);
waita();
break;
}
else {
printf("Enter integer number\n");
waita();
break;
}
waita();
break;
case 13:
printf(".....fmax() function finds maximum between two numbers.....\n");
printf("Enter two numbers to find maximun number\n");
scanf("%lf%lf", &s1, &s2);
res1 = fmax(s1,s2);
printf("The max number is %f\n",res1);
waita();
break;
case 14:
printf(".....fmin() function finds minimum between two numbers.....\n");
printf("Enter two numbers to find minimum number\n");
scanf("%lf%lf", &s1, &s2);
res1 = fmin(s1,s2);
printf("The min number is %f\n",res1);
waita();
break;
case 15:
printf(".....fdim()finds +ve difference bet^n 2 no's & if fails it returns 0.....\n");
printf("Enter two numbers to find difference of two numbers\n");
scanf("%lf%lf", &s1, &s2);
res1 = fdim(s1,s2);
if(res1 == 0) {
printf("This functions returns 0 when first number is less than or equal to second number\n");
waita();
break;
}
printf("The positive Difference is %f\n",res1);
waita();
break;
case 16:
printf(".....roundf() function rounds up a floating value..... \n");
printf("Enter the value for rounding\n");
scanf("%f", &x);
y = roundf(x);
printf("The value after rounding is %f\n", y);
waita();
break;
case 17:
printf(".....lround() function rounds up a long value.....\n");
printf("Enter the value for rounding\n");
scanf("%lf", &n);
y1 = lround(n);
printf("The value after rounding is %li\n", y1);
waita();
break;
case 18:
printf(".....add_poly() function adds two polynomials.....\n");
printf("\nCreate 1st expression\n");
create(&poly1);
printf("\nStored the 1st expression");
show(poly1);
printf("\nCreate 2nd expression\n");
create(&poly2);
printf("\nStored the 2nd expression");
show(poly2);
add_poly(&poly3, poly1, poly2);
show(poly3);
waita();
break;
case 19:
printf(".....sub_poly() function subtract two polynomials..... \n");
printf("\nCreate 1st expression\n");
create(&poly1);
printf("\nStored the 1st expression");
show(poly1);
printf("\nCreate 2nd expression\n");
create(&poly2);
printf("\nStored the 2nd expression");
show(poly2);
sub_poly(&poly3, poly1, poly2);
show(poly3);
waita();
break;
case 20:
printf(".....division() function givesquotient and remainder after division.....\n");
printf("Enter divident\n");
scanf("%d", &no1);
printf("Enter divisor\n");
scanf("%d", &no2);
temp = division(no1, no2);
printf("quotient=%d\tremainder=%d\n", temp.quot, temp.rem);
waita();
break;
case 21:
printf(".....ldexp() function returns value * 2^expoential..... \n");
printf("Enter the value\n");
scanf("%lf", &n);
printf("Enter the integer exponent\n");
scanf("%d", &no1);
m = ldexp(n, no1);
printf("value=%lf\n", m);
waita();
break;;
case 22:
printf(".....exp2() function returns 2^expoential.....\n");
printf("Enter the expoential\n");
scanf("%lf", &n);
m = exp2(n);
printf("exp2(%lf)=%lf\n", n, m);
waita();
break;
case 23:
printf(".....tgamma() fuction calculates gamma value.....\n");
printf("Enter the number to find gamma value\n");
scanf("%lf", &num);
if( num <= 0) {
printf("Gamma of negative number and 0 is not defined \n");
waita();
break;
}
ans = tgamma(num);
printf("gamma(%lf)=%lf\n", num, ans);
waita();
break;
case 24:
printf(".....fact() function returns factorial of a number..... \n");
printf("Enter number to find factorial\n");
scanf("%lf", &n);
ans = fact(n);
printf("The factorial of %lf is %lf\n", n, ans);
waita();
break;
case 25:
printf(".....square() function calculates square of a number.....\n");
printf("Enter number to find square of entered number\n");
scanf("%lf", &n);
ans = square(n);
printf("The square of %lf is %lf\n",n, ans);
waita();
break;
case 26:
printf(".....cube() function calculates cube of a number..... \n");
printf("Enter number to find cube of a entered number\n");
scanf("%lf", &n);
ans = cube(n);
printf("The cube of %lf is %lf\n",n, ans);
waita();
break;
case 27:
printf("dec_bin() function converts decimal number into binary \n");
printf("Enter any fractional Decimal number\n");
scanf("%lf", &fradecimal);
printf("eduivalent binary value is %lf\n",dec_bin(fradecimal));
waita();
break;
case 28:
printf("bin_dec() function converts binary number into decimal \n");
printf("Enter any fractional Binary number\n");
scanf("%s", frabinary);
printf("eduivalent decimal value is %lf\n",bin_dec(frabinary));
waita();
break;
case 29:
printf("This fun. converts decimal number to octal number\n");
printf("Enter a decimal number:\n ");
scanf("%d", &no1);
printf("%d in decimal = %d in octal\n", no1, decimal_octal(no1));
waita();
break;
case 30:
printf("This fun. converts octal number to decimal number\n");
printf("Enter a octal number:\n ");
scanf("%d", &no1);
printf("%d in octal = %d in decimal\n", no1, decimal_octal(no1));
waita();
break;
case 31:
printf("This fun. converts binary number to octal number\n");
printf("Enter a binary number:\n ");
scanf("%d",&no1);
printf("%d in binary = %d in octal\n", no1, binary_octal(no1));
waita();
break;
case 32:
printf("This fun. converts octal number to binary number\n");
printf("Enter a octal number:\n ");
scanf("%d",&no1);
printf("%d in octal = %d in binary\n",no1, octal_binary(no1));
waita();
break;
case 33:
printf("This function converts binary into hex number\n");
printf("Enter the binary number:\n ");
scanf("%ld", &binaryval);
printf("Equivalent hexadecimal value: %lX\n", binary_hex(binaryval));
waita();
break;
case 34:
printf("This function converts hex into binary number\n");
printf("Enter the value for hexadecimal\n ");
scanf("%s", hexa);
hex_binary(hexa);
waita();
break;
case 35:
return 0;
default:
printf(".....wrong choice.....\n");
}
}
case 3:
return 0;
default:
printf("Invalid Choice\n");
}
}
return 0;
}
