10进制转换为2,8,16进制

#!/bin/bash echo "1] 10==>2 2] 10==>8 3] 10==>16 4] exit" while true do echo -n "Input your choice:";read choice case $choice in 1) echo -n "Input a dec number:" read i1 echo "$i1==`echo "obase=2;$i1"|bc`";; 2) echo -n "Input a oct number:";read oct echo "$oct==`echo "obase=8;$oct"|bc`";; 3) echo -n "Input a ox number;";read ox echo "$ox==`echo "obase=16;$ox"|bc`";; 4) exit 1;; *) echo "Input error!" exit 1;; esac done