Count Vowels in C++

 #include <iostream>
#include <string.h>
using namespace std;
#define MAX 100

//prototypes / function(s) declaration
void input(char line[]);
void proc(char line[],int& vow,int& a,int& e,int& i,int& o,int& u);
void display(const int& vow,const int& a,const int& e,const int& i,const int& o,const int& u);
int main()
{
// system("color f1"); //for changing the color of output screen

//declaration / initialization
char line[MAX];
int vow=0,a=0,e=0,i=0,o=0,u=0;
//function(s) calling
input(line);
proc(line,vow,a,e,i,o,u);
display(vow,a,e,i,o,u);

// system("pause");

}//end of main

void input(char line[])
{
cout<<"Enter the line of text to FINISH press Enter Key : \n";
cin.getline(line,MAX);
}//end of input

void proc(char line[],int& vow,int& a,int& e,int& i,int& o,int& u)
{
int len=strlen(line); //getting the length of string
for(int n=0; n<len-1;n++)
{
if((line[n]=='A')||(line[n]=='a'))
{
vow++;
a++;
}
else if((line[n]=='E')||(line[n]=='e'))
{
vow++;
e++;

}
else if((line[n]=='I')||(line[n]=='i'))
{
vow++;
i++;
}
else if((line[n]=='O')||(line[n]=='o'))
{
vow++;
o++;
}
else if((line[n]=='U')||(line[n]=='u'))
{
vow++;
u++;
}
}//end of for

}//end of proc
void display(const int& vow,const int& a,const int& e,const int& i,const int& o,const int& u)
{
cout<<"\n\nVowels found = "<<vow<<"\n\n'A' found = "<<a<<"\n'E' found = "<<e<<"\n'I' found = "<<i<<"\n'O' found = "<<o<<"\n'U' found = "<<u<<endl<<endl;

}//end of display