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for loop problem

[5 Replies]
- 02-Jun-2013 09:48 PM
- Forum: Programming Questions
on line 24 i keep getting "unexpected token: i" error, if I put int before the "i" it says "expected COLON found =" please help.
thanks.
1. String input="";
2. String error="";
3. boolean done=false;
4. float a=0;
5. float b=0;
6. float c=0;
7. int var=1;
8. int i=0;
10. void setup(){
11. size(640,360);
12. }
14. void draw(){
15. background(256,256,256);
16. fill(0,0,0);
17. text("Input numbers:", 20, 40);
18. text(a+"x^2+"+b+"x+"+c, 20, 60);
19. text(input,110,40);
20. fill(256,0,0);
21. text(error,256,80);
22. if (done==true){
23. for(i = (-(b)/2(a))-2; i < (-(b)/2(a))+2; i++){
24. float[] points;
25. points.add(i);
26. }
27. }
28. }
30. void keyPressed(){
31. if((key >= '0' && key <= '9')||key == '.'){
32. input += key;
33. }else if(key == BACKSPACE){
34. if(input==""){
35. }else{
36. input = input.substring( 0, input.length()-1 );
37. }
38. }else if(key == ENTER){
39. switch (var){
40. case 1:
41. if(input.equals("")){
42. error = "Pleas input a number";
43. break;
44. }else{
45. a = Float.parseFloat(input);
46. input = "";
47. error ="";
48. println(a);
49. var++;
50. }
51. break;
52. case 2:
53. if(input.equals("")){
54. error = "Pleas input a number";
55. break;
56. }else{
57. b = Float.parseFloat(input);
58. input = "";
59. error ="";
60. println(b);
61. var++;
62. }
63. break;
64. case 3:
65. if(input.equals("")){
66. error = "Pleas input a number";
67. break;
68. }else{
69. c = Float.parseFloat(input);
70. input = "";
71. error ="";
72. println(c);
73. var++;
74. }
75. done = true;
76. break;
77. }
78. }
79. }

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