Shulou(Shulou.com)06/02 Report--

This article is about how C++ simulates the shell command line. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

1. Parse / * * for command line parsing: * multiple spaces * separator:

| | * * / void parse () {std::string line; getline (std::cin, line); / * * parsing the string * / int len = line.size (), iS0; std::string tmp; std::vector tmp_vc; while (I < line.size ()) {if (line [I] = ='') {icalendar; continue | } if (lineI] = ='|') {vc.push_back (tmp_vc); tmp = ""; iSuppli; continue;} int pos = line.find ('', I); / / get the position of the next space tmp = line.substr (I, pos-i) / / intercept the string tmp_vc.push_back (tmp); I = pos;} vc.push_back (tmp_vc);} II. Execute command function / * * execute command subfunction * / void func (std::vector& v) {char * arr [10]; pid_t pid; pid = fork (); if (pid = =-1) {std::cout

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