| num1,operation,num2,output,flag | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,off by one | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |
| 0,,0,0,wrong sign | |