一个类，num是string类，ch是char类

for(j=0;j<i;j++)
    s.num=s.ch[i-1-j]+'0';
   return s;

什么意思啊‘

把ASCII码转成字符串

C和C++完整教程：https://blog.csdn.net/it_xiangqiang/category_10581430.html
C和C++算法完整教程：https://blog.csdn.net/it_xiangqiang/category_10768339.html

ros kinetic版本  驱动ur5 CB3 将ros_driver换成ros_robot_driver包后catkin_make报错

Invoking "make -j12 -l12" failed