# Example
Filename is `src/test.c`.
Language is auto-detected as `c`.
```src/test.c
void hello(void) {
puts("hello!");
}
```
Or you can explicitly specify the language by `c:`:
```c:src/test.c
void hello(void) {
puts("hello!");
}
```
When you specify only the language, the filename is not shown:
```c:
void hello(void) {
puts("hello!");
}
```
When you specify only the filename, the filename is shown:
```:filename
void hello(void) {
puts("hello!");
}
```
When you don't specify language and filename, the filename is not shown:
```
void hello(void) {
puts("hello!");
}
```
If the filename does not contain a extension, it is regarded both as a filename and a language:
```c
void hello(void) {
puts("hello!");
}
```
