()
| 3 | var evalstack=[]; |
| 4 | |
| 5 | function prefixevaluator() |
| 6 | { |
| 7 | evalst= document.getElementById("prefixvalue").value; |
| 8 | eval=evalst.split(" "); |
| 9 | for(var i=eval.length-1;i>=0;i--) |
| 10 | { |
| 11 | if(!operator(eval[i])) |
| 12 | { |
| 13 | push(eval[i]); |
| 14 | } |
| 15 | else |
| 16 | { |
| 17 | var op1=parseInt(pop()); |
| 18 | var op2=parseInt(pop()); |
| 19 | |
| 20 | if(eval[i]=="+") |
| 21 | { |
| 22 | push(op1+op2); |
| 23 | } |
| 24 | else if(eval[i]=="-") |
| 25 | { |
| 26 | push(op1-op2); |
| 27 | } |
| 28 | else if(eval[i]=="*") |
| 29 | { |
| 30 | push(op1*op2); |
| 31 | } |
| 32 | else |
| 33 | { |
| 34 | push(op1/op2); |
| 35 | } |
| 36 | } |
| 37 | } |
| 38 | document.getElementById("text").innerHTML=(pop()); |
| 39 | } |
| 40 | |
| 41 | function push(e) |
| 42 | { |