function help

I'm trying to write a function to print out a subtotal but i can't seem to get it working please any advice would help. This is basically a calculator program that takes in the amount the user enters and keeps a running total until the user wants to stop.

#include <cstdlib>
#include <iostream>
using namespace std;
struct calc {
char description[20];
float amount;


void printheading();
void subtotal(calc inventory[], int count);

int main ()

calc inventory[100];
int count=0;
char rerun;
float total=0;

cout<<"Please enter the DESCRIPTION: ";

cout<<"Please enter the Amount: ";

subtotal(calc inventory[], count);

cout<<"Would you like to add more transactions?(N or Y) ";
while (rerun == 'Y' || rerun == 'y');

return 0;


void subtotal(calc inventory[], int count)
float subtotal=0;
subtotal += inventory[count].amount;
cout<<"The subtotal is: "<<subtotal<<endl;

void printheading()
cout << "********************CALCULATOR 1.0************************"
<< endl;
cout << "Welcome! " << endl;
cout << "This program computes the total for all your items."
<< endl;
cout << "You supply the information: Description, Amount."
<< endl;
cout << "The program will keep a running total for you until you want to stop."
<< endl;
cout << "**********************************************************"
<< endl;
cout <<"Let's get started ..." << endl;


Last edited on
You need to tell the compiler when to stop looping based on the number of items.

consider adding this line:

if(count <= 100)

to you do while loop.. it will check if you have overstepped your array count and stop you from producing a segmentation fault.
Last edited on
But my function subtotal doesn't even work. Am i passing the arg correctly into the function?
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