C.13 hextoa()
task hextoa(integer i)
—      str.hextoa(i) stores the
ASCII hexadecimal  representation of i
into str (inverse of atohex).
C.14 octtoa()
task octtoa(integer i)
—      str.octtoa(i) stores the
ASCII octal  representation of i into
str (inverse of atooct).
C.15 bintoa()
task bintoa(integer i)
—      str.bintoa(i) stores the
ASCII binary  representation of i into
str (inverse of atobin).
C.16 realtoa()
task realtoa(integer i)
—      str.realtoa(i) stores the
ASCII real  representation of i into
str (inverse of atoreal).