Need assistance--plz!

I'm working on a calculator program. It is suppose to accumulate the operations performed. Acceptable characters are +, -, *, %, /, =, and !

Where I run into problems is printing the results when the characters input are = or !.

The following is my code (less the statement for = & ! (I keep getting an endless loop).

I'm still learning, so bear with me for any mistakes within the code.

Any help would be appreciated. Thank you!

Code:

#include <iostream.h>
int   result;    // the result of the calculations 
char  oper_char; // the user-specified operator 
int   value;     // value specified after the operator 
main()
{
    result = 0; // initialize the result 
 
    // loop forever (or until break reached)
    while (1) {
        cout << "Result: " << result << '\n';
        cout << "Enter operator and number: ";
 
        cin >> oper_char;
 
        if (oper_char == '!')
            break;
 
        cin >> value;
        if (oper_char == '+') {
            result += value;
        } else if (oper_char == '-') {
            result -= value;
        } else if (oper_char == '*') {
            result *= value;
		} else if (oper_char == '%') {
			result %= value;
        } else if (oper_char == '/') {
            if (value == 0) {
                cout << "Error: Divide by zero\n";
                cout << "   operation ignored\n";
            } else
                result /= value;
        } else {
            cout << "Unknown operator " << oper_char << '\n';
        }
    }
    return (0);
}

make

while (1) {


while(oper_char != '!') {