27 UINT popOperand(STACK_OPERAND *stack, double *operand)  in popOperand()  argument
31     top = stack -> top;  in popOperand()
34         *operand = stack -> operand[top];  in popOperand()
35         stack -> top --;  in popOperand()
42 UINT pushOperand(STACK_OPERAND *stack, double operand)  in pushOperand()  argument
44     stack -> top ++;  in pushOperand()
45     stack -> operand[stack -> top] = operand;  in pushOperand()
50 UINT popOperation(STACK_OPERATION *stack, char *operation)  in popOperation()  argument
54     top = stack -> top;  in popOperation()
57         *operation = stack -> operation[top];  in popOperation()
58         stack -> top --;  in popOperation()
65 UINT pushOperation(STACK_OPERATION *stack, char operation)  in pushOperation()  argument
67     stack -> top ++;  in pushOperation()
68     stack -> operation[stack -> top] = operation;  in pushOperation()