C++ help

#include<stdio.h>

//declare functions
void inputData(char, char, char, char, char,
			   char, char, char, char, char,
			   float, int, char, char);
void output(char, char, char, char, char, 
			char, char, char, char, char,
			int, float);
int main(void)
{
	//declare variables
	char n_1;
	char n_2;
	char n_3;
	char n_4;
	char n_5;
	char n_6;
	char n_7;
	char n_8;
	char n_9;
	char n_10;
	float price;
	int enrollment;
	char R_S;
	char N_O;
	int copies;
	float profit;



	//Input
	n_1=inputData();
	n_2=inputData();
	n_3=inputData();
	n_4=inputData();
	n_5=inputData();
	n_6=inputData();
	n_7=inputData();
	n_8=inputData();
	n_9=inputData();
	n_10=inputData();
	inputData(price, enrollment);
	R_S=inputData();
	N_O=inputData();

	//Calculations

	//Output
	output(n_1, n_2, n_3, n_4, n_5, n_6, n_7,
			n_8, n_9, n_10, copies, profit);

	return 0;
}///End Main///////////////////////////////

void inputData(char n_1, char n_2, char n_3, char n_4, char n_5, 
			   char n_6, char n_7, char n_8, char n_9, char n_10,
			   float price, int enrollment, char R_S, char N_O)
{	
	//Prompt user for necessary information
	printf("Enter book number: ");
	scanf(" %c %c %c %c %c %c %c %c %c %c", 
		&n_1, &n_2, &n_3, &n_4, &n_5, &n_6, &n_7, &n_8, &n_9, &n_10);
	
	printf("Enter price per copy: ");
	scanf("%.2f", &price);

	printf("Enter expected class enrollment: ");
	scanf("%f", &enrollment);
	
	printf("Enter 'R' if required or 'S' if suggested: ");
	scanf(" %c", &R_S);
	
	printf("Enter 'N' if new or 'O' if not a new text: ");
	scanf(" %c", &N_O);
	
	return ;
}

void output(char n_1, char n_2, char n_3, char n_4, char n_5, 
			char n_6, char n_7, char n_8, char n_9, char n_10,
			int copies, float profit)
{
	
	
	printf("ISBN: %c - %c %c - %c %c %c %c %c %c - %c", 
		&n_1, &n_2, &n_3, &n_4, &n_5, &n_6, &n_7, &n_8, &n_9, &n_10);
	printf("Copies Needed: %d", &copies);
	printf("Profit: %f", &profit);

	return;

}