dot.dot

digraph structs {                                                               
    node [shape=record]                                                         
    rankdir=LR                                                                  
    struct1 [label="{<ptr> ptr|{len|5}|{capacity|5}}"]                          
    struct3 [label="{{<i0> 0|h}|{1|e}|{2|l}|{3|l}|{4|o}}}"]                     
    struct1:ptr -> struct3:i0 [splines=curved]                                  
}