#include <stdio.h>

float Expression() {
       char Operator, nextc;
       float Answer, NewNumber;
       Answer =0;
       Operator ='+';
       while ((Operator!='=') && (Operator!=')'))
       {
          nextc = getchar();
          if (nextc=='(') NewNumber =Expression(); else {
             ungetc(nextc,stdin);
             scanf("%f",&NewNumber);
          }
          switch (Operator) {
case '+':        Answer += NewNumber; break;
case '-':        Answer -= NewNumber; break;
case '*':        Answer *= NewNumber; break;
case '/':        Answer /= NewNumber; break;
          }    /* switch */
          Operator = getchar();
       }    /* end while loop */
       return Answer;
}    /* end Expression */ 

void main() {
    printf("Final answer is %f\n",Expression());
}