@Mission, you're right, the structs should have been before the function definitions. Also the "struct" keyword isn't required (although that caused some strange results in my last C++ project
).
It's still allowed though, so I only moved the struct definitions.
Revised code:
Code:
#include <iostream>
#include <conio.h> // For getch() and clrscr()
#include <math.h> // For Math Functions
#include <stdio.h> // For gets() function
using std::cout;
using std::cin;
using std::endl;
struct calc_info
{
float principal,rate,period;
};
struct invest_info
{
float income,expen,interest,period;
};
void interest(struct calc_info calc1);
void fd_tds(struct calc_info calc1);
void invest_func(struct invest_info invest);
int main()
{
cout<<"\t\tWelcome to Banking Calculator by" << endl;
cout<<"\t\t\tClass : XI-B, Roll Number : 11" << endl << endl;
int ch;
struct calc_info calc;
struct invest_info invest;
cout<<"Enter 1 for calculations regarding Interest" << endl;
cout<<"Enter 2 for Calculation of Maturity of Fixed Deposit with Tax Deduction at Source ( TDS )" << endl;
cout<<"Enter 3 to calculate cash value of an Investment" << endl;
cin>>ch;
switch(ch)
{
case 1: cout<<"Enter Principal Amount" << endl;
cin>>calc.principal;
cout<<"Enter Rate of Interest" << endl;
cin>>calc.rate;
cout<<"Enter Time Period ( In Months )";
cin>>calc.period;
interest(calc);
break;
case 2: cout<<"Enter Principal Amount" << endl;
cin>>calc.principal;
cout<<"Enter Rate of Interest ( Ask your bank about this !! )" << endl;
cin>>calc.rate;
cout<<"Enter the Time period of your fixed deposit ( In Years )" << endl;
cin>>calc.period;
fd_tds(calc);
break;
case 3: cout<<"Enter Your Income" << endl;
cin>>invest.income;
cout<<"Enter Your Expenses amount" << endl;
cin>>invest.expen;
cout<<"Enter the Interest Rate" << endl;
cin>>invest.interest;
cout<<"Enter Investment Period" << endl;
cin>>invest.period;
invest_func(invest);
break;
default: cout<<"Wrong Choice Entered, Aborting" << endl;
}
return 0;
}
void interest(struct calc_info calc1);
{
float si,ci,co;
int ch1;
cout<<"Enter 1 to calculate Simple Interest" << endl;
cout<<"Enter 2 to calculate Compount Interest" << endl;
cout<<"Enter 3 to calculate Commercial Interest" << endl;
cin>>ch1;
calc1.period=(calc1.period/12);
switch(ch1)
{
case 1: si=((calc1.principal*calc1.rate*calc1.period)/100);
cout<<"The Simple Interest for the Loan is "<<si;
break;
case 2: ci=((calc1.principal*(1+(calc1.rate/100)))^calc1.period;
cout<<"The Compound Interest for the Loan is "<<ci;
break;
case 3: co=((calc1.principal*calc1.rate*(calc1.period*30))/(100*360))
cout<<"The Commercial Interest for the Loan is "<<co;
break;
default: cout<<"Wrong Choice Entered, Aborting" << endl;
}
}
void invest_func(struct invest_info invest1)
{
float cash;
cash=((invest1.income-invest1.expen)*(1+invest1.rate/100)^-invest1.period);
cout<<"The cash value of an investment is "<<cash;
}
Edit:
A bit info-less post, so I'll add this to make it more informative:
You could also use a header file instead. This is particulary useful for documents with many functions, object definitions etc. And it's almost a necessity for programs consisting of multiple files.
Say your program is called "dhruv.cpp", then we'd call the header "dhuv.h".
"dhruv.h":
Code:
#ifndef DHRUV_H_
#define DHRUV_H_
/* Structs */
struct calc_info
{
float principal,rate,period;
};
struct invest_info
{
float income,expen,interest,period;
};
/* Functions */
void interest(struct calc_info calc1);
void fd_tds(struct calc_info calc1);
void invest_func(struct invest_info invest);
int main();
#endif /* DHRUV_H_ */
"dhruv.cpp":
Code:
#include <iostream>
#include <conio.h> // For getch() and clrscr()
#include <math.h> // For Math Functions
#include <stdio.h> // For gets() function
#include "dhruv.h"
using std::cout;
using std::cin;
using std::endl;
int main()
{
cout<<"\t\tWelcome to Banking Calculator by" << endl;
cout<<"\t\t\tClass : XI-B, Roll Number : 11" << endl << endl;
int ch;
struct calc_info calc;
struct invest_info invest;
cout<<"Enter 1 for calculations regarding Interest" << endl;
cout<<"Enter 2 for Calculation of Maturity of Fixed Deposit with Tax Deduction at Source ( TDS )" << endl;
cout<<"Enter 3 to calculate cash value of an Investment" << endl;
cin>>ch;
switch(ch)
{
case 1: cout<<"Enter Principal Amount" << endl;
cin>>calc.principal;
cout<<"Enter Rate of Interest" << endl;
cin>>calc.rate;
cout<<"Enter Time Period ( In Months )";
cin>>calc.period;
interest(calc);
break;
case 2: cout<<"Enter Principal Amount" << endl;
cin>>calc.principal;
cout<<"Enter Rate of Interest ( Ask your bank about this !! )" << endl;
cin>>calc.rate;
cout<<"Enter the Time period of your fixed deposit ( In Years )" << endl;
cin>>calc.period;
fd_tds(calc);
break;
case 3: cout<<"Enter Your Income" << endl;
cin>>invest.income;
cout<<"Enter Your Expenses amount" << endl;
cin>>invest.expen;
cout<<"Enter the Interest Rate" << endl;
cin>>invest.interest;
cout<<"Enter Investment Period" << endl;
cin>>invest.period;
invest_func(invest);
break;
default: cout<<"Wrong Choice Entered, Aborting" << endl;
}
return 0;
}
void interest(struct calc_info calc1);
{
float si,ci,co;
int ch1;
cout<<"Enter 1 to calculate Simple Interest" << endl;
cout<<"Enter 2 to calculate Compount Interest" << endl;
cout<<"Enter 3 to calculate Commercial Interest" << endl;
cin>>ch1;
calc1.period=(calc1.period/12);
switch(ch1)
{
case 1: si=((calc1.principal*calc1.rate*calc1.period)/100);
cout<<"The Simple Interest for the Loan is "<<si;
break;
case 2: ci=((calc1.principal*(1+(calc1.rate/100)))^calc1.period;
cout<<"The Compound Interest for the Loan is "<<ci;
break;
case 3: co=((calc1.principal*calc1.rate*(calc1.period*30))/(100*360))
cout<<"The Commercial Interest for the Loan is "<<co;
break;
default: cout<<"Wrong Choice Entered, Aborting" << endl;
}
}
void invest_func(struct invest_info invest1)
{
float cash;
cash=((invest1.income-invest1.expen)*(1+invest1.rate/100)^-invest1.period);
cout<<"The cash value of an investment is "<<cash;
}
In case you were wondering about these lines
Code:
#ifndef DHRUV_H_
#define DHRUV_H_
/* ... */
#endif
They are preprocessor directives. When the preprocessor starts processing your "dhruv.cpp", it sees "dhruv.h" has to be included. Then it checks "dhruv.h", and if "DHRUV_H_" is not already defined, it defines it and copies anything inside the ifndef and endif. If a file would be included twice (this gets important in multi-file programs!) DHRUV_H_ will already be defined, so the content of "dhruv.h" doesn't get copied again. If it would have been copied, you would have multiple definitions of anything in "dhruv.h", causing the compiler to fail.
