hii readers,
In Today's Post, I am going to share with you a simple C++ Script, That can help a newbie in Understanding Argument Parsing Concept.
Codes Section (Include Header Files)
// Include header file
#include <iostream>
#include <string>
Codes Section 2
// Option Parser Extracting Class
class OptionParser
{
private:
char **argv;
int argc;
int ret, b;
std::string temp;
std::string a;
public:
// Define Functions
std::string getvalue(const char *s); // Get Argument Index In Return
std::string getargv(int i); // Get Argument As String In Return
int check(const char *s); // check char availability and return Index
void load(int argc, char **argv); // Load Data
};
Codes Section 3
/*
Functions
*/
std::string OptionParser::getvalue(const char *p){
b=0;
a="";
b=check(p);
if ((b!=0)&&((b+1)<argc)){
a = getargv(b+1);
}
return a;
};
std::string OptionParser::getargv(int i){
temp = argv[i];
return temp;
};
Codes Section 4
int OptionParser::check(const char *s){
ret = 0;
temp = "";
// Iter arguments
for(int i=0; i<argc; i++){
// Take argument
temp = getargv(i);
if(temp==s){
ret = i;
}
}
return ret;
};
void OptionParser::load(int argn, char **argm){
argv = argm;
argc = argn;
};
Codes Section 5
// main function
int main(int argc, char **argv){
// Create Object handler
OptionParser parse;
// Load Data Into Object
parse.load(argc, argv);
// Get Loaded Argument;
std::cout << " No. Of Argument : " << argc << "\n";
std::cout << " First Argument : " << parse.getargv(argc-1) << "\n";
// check input
std::cout << " Check Input (-h) : " << parse.check("-h") << "\n";
if (parse.check("-h"))
{
//std::string x;
std::cout << " Get Value Of h : " << parse.getvalue("-h") << "\n";
}
return 0;
}
Codes Section 6
Complete Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | // Include header file #include <iostream> #include <string>
// Option Parser Extracting Class class OptionParser { private:
char **argv; int argc; int ret, b; std::string temp; std::string a; public:
// Define Functions std::string getvalue(const char *s); // Get Argument Index In Return std::string getargv(int i); // Get Argument As String In Return int check(const char *s); // check char availability and return Index void load(int argc, char **argv); // Load Data };
/* Functions
*/
std::string OptionParser::getvalue(const char *p){
b=0; a="";
b=check(p);
if ((b!=0)&&((b+1)<argc)){ a = getargv(b+1); } return a;
};
std::string OptionParser::getargv(int i){
temp = argv[i]; return temp;
};
int OptionParser::check(const char *s){
ret = 0; temp = ""; // Iter arguments for(int i=0; i<argc; i++){ // Take argument temp = getargv(i); if(temp==s){ ret = i; }
} return ret;
};
void OptionParser::load(int argn, char **argm){ argv = argm; argc = argn; };
// main function int main(int argc, char **argv){ // Create Object handler OptionParser parse; // Load Data Into Object parse.load(argc, argv); // Get Loaded Argument; std::cout << " No. Of Argument : " << argc << "\n"; std::cout << " First Argument : " << parse.getargv(argc-1) << "\n"; // check input std::cout << " Check Input (-h) : " << parse.check("-h") << "\n"; if (parse.check("-h")) { //std::string x; std::cout << " Get Value Of h : " << parse.getvalue("-h") << "\n"; }
return 0; }
|
After Compiling These Codes, Run To Test it.
C_Programs :~# ./argument -h bitforestinfo
No. Of Argument : 3
First Argument : bitforestinfo
Check Input (-h) : 1
Get Value Of h : bitforestinfo