Program:

    #include<iostream.h>
    #include<conio.h>

    void main()
    {
    char a[80],ch;
    int I,j,count,occured,total=0;
    clrscr();
    cout<<"\nEnter the stream of characters terminated by \ "Enter\ " key: \n\n";
    ch=getche();
    while(ch!='\r');
    {
    a[total++]=ch;
    ch=getche();
    }
    cout<<"\n\nInputted Stream of Characters is: \n\n";
    for(I=0;I<total;I++)
    cout<<a[I];
    cout<<"\n\n**********OUTPUT**********\n";
    cout<<"\nTotal characters inputted: "<<I<<"\n";
    cout<<"\nCharacter Frequency\n\n";
    for(I=0;I<total;I++)
    {
    occured=0;
    count=1;
    for(j=I-1;j>=0;j--)
    {
    if(a[j]==a[I])
    {
    occured=1;
    break;
    }
    }
    if(!occured)
    {
    for(j=I+1;j<total;j++)
    {
    if(a[j]==a[I])
    count++;
    }
    cout<<"      "<<a[I]<<"         "<<count<<"\n";
    }
    }
    getch();
    }