编写程序,删除字符串中的指定字符，字符串和要删除的字符由键盘输入。编写主函数和函数stoi()。主函数进行输入、输出和函数调用，stoi()的功能是将一数字串转化为对应的整数。-Write a program that deletes the specified characters in the string, the string, and the characters to be deleted the keyboard. Write the main function and func