| Name | Type | Default | Description |
| formatStr | String or char* | - | Message. The string can contain %-markes , see here to learn more. An additional parameter is expected in the (correct) sequence and with the correct type for each of these markers. |
| ... | Depending on the %-markers | - | Values or variables according to the %-markers in formatStr |
This is not completely correct : 1 == 1.1000
showerror ("Seems to be wrong : %d == %f", 1, 1.1);