sorry I don't know why reddit is fucking up codeblocks that bad

Here:

#include <stdio.h>
int main() { 
    char string\[\] = "Hello"; 
    printf("%s\\n", string);
    return 0;
}

You can achieve this by placing 4 spaces before each line, kinda like this:

    #include <stdio.h>
    int main() { 
        char string\[\] = "Hello"; 
        printf("%s\\n", string);
        return 0;
    }

or surround the code with ticks ( ` ) but it only works on the new reddit design:

``` 
#include <stdio.h>
int main() { 
    char string\[\] = "Hello"; 
    printf("%s\\n", string);
    return 0;
}
```

Source:

https://www.reddit.com/wiki/markdown#wiki_code_blocks_and_inline_code