#include <stdio.h>
#include <ctype.h>
#include "exprParser.h"

main()
{
    int t;
    int op;
    int result;

    op = NUM;
    result = 0;
    while(1){
	getToken()
	switch(currentToken){
	case NUM:
	    switch(op){
	    case NUM: 
		result = tokenVal;
		break;
	    case PLUS_OP:
		result = result + tokenVal;
		break;
	    case MINUS_OP:
		result = result - tokenVal;
		break;
	    }
	    break;
	case PLUS_OP:
	case MINUS_OP:
	    op = t;
	    break;
	case EOL:
	    printf("result = %d\n",result);
	    exit(0);
	}
    }
}