/* FCALC.C */›/* A simple floating point calculator */›  ›main() $(›  char a[6],b[6],sum[6],c; /* a,b, and sum will be used as floating point numbers */›  printf("\fA simple floating point calculator\n");›  printf("Enter a number, a space or RETURN,\n,an operator, a space or RETURN\n");›  printf("and a second number.\nExample: 2 + 2 RETURN\n");›  printf("Allowable operators are: +,-,/,*\n\n");›  printf("Press BREAK key to quit.\n\n");›  while(scanf("%f %c %f",a,&c,b) >= 0) $( /* BREAK key will return -128 */›    switch(c) $(›      case '+':›        fadd(a,b,sum);›        break;›      case '-':›        fsub(a,b,sum);›        break;›      case '*':›        fmul(a,b,sum);›        break;›      case '/':›        fdiv(a,b,sum);›        break;›      default:›        printf("%c is an unkown operator.\n",c);›        continue;›    $)›    printf("%f %c %f = %f\n",a,c,b,sum);›  $)›$)›