extra codeHEADmaster

23 files changed, 2306 insertions, 0 deletions

diff --git a/CPP/cpp_book/chap6/approval.cpp b/CPP/cpp_book/chap6/approval.cpp
new file mode 100644
index 0000000..c31c7b5
--- /dev/null
+++ b/CPP/cpp_book/chap6/approval.cpp
@@ -0,0 +1,28 @@
+#include <vector>
+#include <iostream>
+#include "student_info.h"
+#include "grade.h"
+#include "approval.h"
+
+bool fgrade(const StudentInfo& s) {
+	return grade(s) < 60;
+}
+
+std::list<StudentInfo>
+extract_fails(
+	std::list<StudentInfo>& students)
+{
+	std::list<StudentInfo> fail;
+	std::list<StudentInfo>::iterator iter = students.begin();
+
+	while (iter != students.end()) {
+		if (fgrade(*iter)) {
+			fail.push_back(*iter);
+			iter = students.erase(iter);
+		} else {
+			iter++;
+		}
+	}
+
+	return fail;
+}
diff --git a/CPP/cpp_book/chap6/approval.h b/CPP/cpp_book/chap6/approval.h
new file mode 100644
index 0000000..6db01e3
--- /dev/null
+++ b/CPP/cpp_book/chap6/approval.h
@@ -0,0 +1,10 @@
+#ifndef APPROVAL_H
+#define APPROVAL_H
+
+#include <list>
+#include "student_info.h"
+
+bool fgrade(const StudentInfo& s);
+std::list<StudentInfo> extract_fails(std::list<StudentInfo>& students);
+
+#endif /* APPROVAL_H */
diff --git a/CPP/cpp_book/chap6/cscope.out b/CPP/cpp_book/chap6/cscope.out
new file mode 100644
index 0000000..e59c74b
--- /dev/null
+++ b/CPP/cpp_book/chap6/cscope.out
@@ -0,0 +1,1764 @@
+cscope 15 $HOME/Source/PERSONAL/playground/CPP/cpp_book/chap6               0000007269
+	@approval.cpp
+
+1 
+	~<ve��
+>
+
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+) {
+
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+
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+}
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+
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+APPROVAL_H
+
+
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+	#APPROVAL_H
+
+
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+
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+
+21 
+	g�
+.
+��r
+();
+
+24  
+	g�
+;
+
+27 
+	g�d
+::
+i��am
+& 
+	$�ad_�ud�t
+(
+�d
+::
+i��am
+& 
+is
+, 
+Stud�tInfo
+& 
+s
+)
+
+30 
+is
+ >> 
+s
+.
+�me
+ >> s.
+mid�rm
+ >> s.
+f��
+;
+
+32 
+	`�ad_homew�k
+(
+is
+, 
+s
+.
+homew�k
+);
+
+33  
+is
+;
+
+34 
+	}
+}
+
+	@student_info.h
+
+1 #i�de�
+STUDENT_INFO_H
+
+
+2 

+	#STUDENT_INFO_H
+
+
+	)
+
+4 
+	~<io��am
+>
+
+5 
+	~<�r�g
+>
+
+6 
+	~<ve��
+>
+
+8 
+	sStud�tInfo
+ {
+
+9 
+	m�d
+::
+�r�g
+ 
+�me
+;
+
+10 
+	mmid�rm
+;
+
+11 
+	mf��
+;
+
+12 
+	m�d
+::
+ve��
+<> 
+homew�k
+;
+
+16 
+bo�
+ 
+com��_�ud�ts
+(cڡ 
+Stud�tInfo
+& 
+a
+, cڡ Stud�tInfo& 
+b
+);
+
+17 
+	g�d
+::
+i��am
+& 
+�ad_homew�k
+(
+�d
+::i��am& 
+�
+, std::
+ve��
+<>& 
+hw
+);
+
+18 
+	g�d
+::
+i��am
+& 
+�ad_�ud�t
+(
+�d
+::i��am& 
+is
+, 
+Stud�tInfo
+& 
+s
+);
+
+	@
+1
+.
+1
+/usr/include
+10
+129
+approval.cpp
+approval.h
+grade.cpp
+grade.h
+grades.cpp
+median.cpp
+median.h
+split_str/split_str.cpp
+student_info.cpp
+student_info.h
diff --git a/CPP/cpp_book/chap6/find_url/find_url b/CPP/cpp_book/chap6/find_url/find_url
new file mode 100755
index 0000000..4d7ac32
--- /dev/null
+++ b/CPP/cpp_book/chap6/find_url/find_url
diff --git a/CPP/cpp_book/chap6/find_url/furl.cpp b/CPP/cpp_book/chap6/find_url/furl.cpp
new file mode 100644
index 0000000..17e9822
--- /dev/null
+++ b/CPP/cpp_book/chap6/find_url/furl.cpp
@@ -0,0 +1,88 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+static bool
+not_url_char(char c)
+{
+	static const std::string url_ch = "~;/?:@=&$-_.+!*`(),";
+
+	return !(isalnum(c) ||
+		 find(url_ch.begin(), url_ch.end(), c) != url_ch.end());
+}
+
+static std::string::const_iterator
+url_beg(
+	std::string::const_iterator b,
+	std::string::const_iterator e)
+{
+	static const std::string sep = "://";
+
+	std::string::const_iterator i = b;
+
+	while ((i = search(i, e, sep.begin(), sep.end())) != e) {
+
+		// make sure the separator isn't at the beginning of the line
+		if (i != b && i + sep.size() != e) {
+
+			// beg marks the beginning of the protocol name
+			std::string::const_iterator beg = i;
+			while (beg != b && isalpha(beg[-1]))
+				beg--;
+
+			// Is there at least one char before and after the separator?
+			if (beg != i && !not_url_char(i[sep.size()])) {
+				return beg;
+			}
+		}
+
+		// The separator we found wasn't part of a URL;
+		// advance i past the separator
+		i += sep.size();
+	}
+
+	return e;
+
+}
+
+static std::string::const_iterator
+url_end(
+	std::string::const_iterator b,
+	std::string::const_iterator e)
+{
+	return find_if(b, e, not_url_char);
+}
+
+/*
+ * Find URLs in the string 's' and return
+ * a vector containing all strings found.
+ * We ignore the protocol and just get the url
+ */
+std::vector<std::string>
+find_urls(const std::string& s)
+{
+	std::vector<std::string> ret;
+	std::string::const_iterator b = s.begin();
+	std::string::const_iterator e = s.end();
+
+	while (b != e) {
+
+		/* Look for one or more chars followed by '://' */
+		b = url_beg(b, e);
+
+		/* Found it? */
+		if (b != e) {
+
+			/* Get the end of the URL after '://' */
+			std::string::const_iterator after = url_end(b, e);
+
+			/* Save the url */
+			ret.push_back(std::string(b, after));
+
+			/* Advance b and check if file has more URLs */
+			b = after;
+		}
+	}
+
+	return ret;
+}
diff --git a/CPP/cpp_book/chap6/find_url/main.cpp b/CPP/cpp_book/chap6/find_url/main.cpp
new file mode 100644
index 0000000..8bd9416
--- /dev/null
+++ b/CPP/cpp_book/chap6/find_url/main.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+std::vector<std::string> find_urls(const std::string& s);
+
+int
+main(void)
+{
+	std::string s;
+
+	while(std::getline(std::cin, s)) {
+		std::vector<std::string> urls;
+		urls = find_urls(s);
+
+		std::vector<std::string>::const_iterator i = urls.begin();
+
+		while (i != urls.end()) {
+			std::cout << *i << std::endl;
+			i++;
+		}
+	}
+
+	return 0;
+}
+
diff --git a/CPP/cpp_book/chap6/find_url/text.txt b/CPP/cpp_book/chap6/find_url/text.txt
new file mode 100644
index 0000000..b068661
--- /dev/null
+++ b/CPP/cpp_book/chap6/find_url/text.txt
@@ -0,0 +1,3 @@
+http://www.ronaldo.com
+parangaricotirimirruaru
+https://www.toxiclabs.cc
diff --git a/CPP/cpp_book/chap6/grade.cpp b/CPP/cpp_book/chap6/grade.cpp
new file mode 100644
index 0000000..0a08217
--- /dev/null
+++ b/CPP/cpp_book/chap6/grade.cpp
@@ -0,0 +1,27 @@
+#include <vector>
+#include "student_info.h"
+#include "median.h"
+#include "grade.h"
+
+double grade(double midterm, double final, double homework)
+{
+	return (midterm * 0.2 +
+		final * 0.4 +
+		homework * 0.4);
+}
+
+/* Overloads above grade() */
+double grade(double midterm, double final, const std::vector<double>& hw)
+{
+	if (hw.size() == 0)
+		throw std::domain_error("Student has no homework");
+
+	return grade(midterm, final, median(hw));
+}
+
+double grade(const StudentInfo& s)
+{
+	return grade(s.midterm, s.final, s.homework);
+}
+
+
diff --git a/CPP/cpp_book/chap6/grade.h b/CPP/cpp_book/chap6/grade.h
new file mode 100644
index 0000000..7cd73d1
--- /dev/null
+++ b/CPP/cpp_book/chap6/grade.h
@@ -0,0 +1,11 @@
+#ifndef GRADE_H
+#define GRADE_H
+
+#include <vector>
+#include "student_info.h"
+
+double grade(double midterm, double final, double homework);
+double grade(double midterm, double final, const std::vector<double>& hw);
+double grade(const StudentInfo& s);
+
+#endif /* GRADE_H */
diff --git a/CPP/cpp_book/chap6/grades b/CPP/cpp_book/chap6/grades
new file mode 100755
index 0000000..f9c52ad
--- /dev/null
+++ b/CPP/cpp_book/chap6/grades
diff --git a/CPP/cpp_book/chap6/grades.cpp b/CPP/cpp_book/chap6/grades.cpp
new file mode 100644
index 0000000..acbc1e0
--- /dev/null
+++ b/CPP/cpp_book/chap6/grades.cpp
@@ -0,0 +1,63 @@
+#include <iomanip>	// IO Manipulators
+#include <ios>
+#include <iostream>
+#include <string>
+#include <list>
+#include <algorithm>
+#include <stdexcept>
+#include "grade.h"
+#include "student_info.h"
+#include "approval.h"
+
+using std::cin;		using std::string;
+using std::cout;	using std::endl;
+
+int
+main(void)
+{
+	std::list<StudentInfo> students, fail;
+	StudentInfo record;
+	string::size_type maxlen = 0;
+
+	while (read_student(cin, record)) {
+		maxlen = std::max(maxlen, record.name.size());
+		students.push_back(record);
+	}
+
+	students.sort(compare_students);
+
+	for (std::list<StudentInfo>::iterator i = students.begin();
+	     i != students.end();
+	     i++) {
+
+		cout << i->name
+		     << string(maxlen + 1 - i->name.size(), ' ');
+
+		try {
+			double final_grade = grade(*i);
+
+			std::streamsize prec = cout.precision();
+			cout << std::setprecision(3) << final_grade
+			     << std::setprecision(prec);
+			cout << " - Student "
+			     << (fgrade(*i) ? "Failed" : "Approved");
+
+		} catch (std::domain_error& e){
+			cout << e.what();
+		}
+
+		cout << endl;
+	}
+
+	fail = extract_fails(students);
+
+	std::cout << "Failed students: " << std::endl;
+
+	for (std::list<StudentInfo>::iterator i = fail.begin();
+	     i != fail.end();
+	     i++) {
+		std::cout << i->name << std::endl;
+	}
+
+	return 0;
+}
diff --git a/CPP/cpp_book/chap6/median.cpp b/CPP/cpp_book/chap6/median.cpp
new file mode 100644
index 0000000..e9932e8
--- /dev/null
+++ b/CPP/cpp_book/chap6/median.cpp
@@ -0,0 +1,21 @@
+#include <vector>
+#include <algorithm>
+#include <stdexcept>
+
+double median(std::vector<double> vec)
+{
+	std::vector<double>::size_type mid, size;
+
+	size = vec.size();
+
+	if (size == 0)
+		throw std::domain_error("median of an empty vector");
+
+	sort(vec.begin(), vec.end());
+
+	mid = size / 2;
+
+	return size % 2 == 0 ? (vec[mid] + vec[mid - 1]) / 2
+			     : vec[mid];
+
+}
diff --git a/CPP/cpp_book/chap6/median.h b/CPP/cpp_book/chap6/median.h
new file mode 100644
index 0000000..f4e6580
--- /dev/null
+++ b/CPP/cpp_book/chap6/median.h
@@ -0,0 +1,8 @@
+#ifndef MEDIAN_H
+#define MEDIAN_H
+
+#include <vector>
+
+double median(std::vector<double> vec);
+
+#endif /* MEDIAN_H */
diff --git a/CPP/cpp_book/chap6/split_str/split_str b/CPP/cpp_book/chap6/split_str/split_str
new file mode 100755
index 0000000..ca1e6aa
--- /dev/null
+++ b/CPP/cpp_book/chap6/split_str/split_str
diff --git a/CPP/cpp_book/chap6/split_str/split_str.cpp b/CPP/cpp_book/chap6/split_str/split_str.cpp
new file mode 100644
index 0000000..1c03bb2
--- /dev/null
+++ b/CPP/cpp_book/chap6/split_str/split_str.cpp
@@ -0,0 +1,152 @@
+#include <iostream>
+#include <vector>
+#include <cctype>
+#include <algorithm>
+
+bool
+space(char c)
+{
+	return isspace(c);
+}
+
+bool
+not_space(char c)
+{
+	return !isspace(c);
+}
+
+std::vector<std::string>
+split(const std::string& s)
+{
+	std::vector<std::string> ret;
+	std::string::const_iterator i = s.begin();
+
+	/* Invariant: we have processed characters [start i, i) */
+	while (i != s.end()) {
+
+		/* Find the first non_space char */
+		i = find_if(i, s.end(), not_space);
+
+		/*
+		 * Find the end of current word
+		 *
+		 * Invariant: None of the characters between [i, j) are spaces
+		 */
+		std::string::const_iterator j = find_if(i, s.end(), space);
+
+		/* If we found non-whitespace chars, push to the vector */
+		if (i != s.end())
+			ret.push_back(std::string(i, j));
+
+		i = j;
+	}
+
+	return ret;
+}
+
+std::string::size_type
+width(const std::vector<std::string>& v)
+{
+	std::string::size_type ret = 0;
+
+	for (std::vector<std::string>::const_iterator i = v.begin();
+	     i != v.end();
+	     i++)
+		ret = std::max(ret, i->size());
+
+	return ret;
+}
+
+std::vector<std::string>
+frame(const std::vector<std::string>&v) {
+
+	std::vector<std::string> ret;
+	std::string::size_type w = width(v);
+	std::string border(w + 4, '*');
+
+	ret.push_back(border);
+
+	for (std::string::size_type i = 0;
+	     i != v.size();
+	     i++)
+		ret.push_back("* " + v[i] + std::string(w - v[i].size(), ' ') + " *");
+
+	ret.push_back(border);
+
+	return ret;
+}
+
+std::vector<std::string>
+vcat(
+	const std::vector<std::string>& v1,
+	const std::vector<std::string>& v2) {
+
+	std::vector<std::string> ret = v1;
+
+	for (std::vector<std::string>::const_iterator i = v2.begin();
+	     i < v2.end();
+	     i++)
+		ret.push_back(*i);
+
+	return ret;
+}
+
+std::vector<std::string>
+hcat(
+	const std::vector<std::string>& v1,
+	const std::vector<std::string>& v2) {
+
+	std::vector<std::string> ret;
+
+	std::string::size_type w1 = width(v1) + 1;
+
+
+	std::vector<std::string>::size_type i = 0, j = 0;
+
+	while (i != v1.size() || j != v2.size()) {
+		std::string s;
+
+		if (i != v1.size())
+			s = v1[i++];
+
+		s += std::string(w1 - s.size(), ' ');
+
+		if (j != v2.size())
+			s += v2[j++];
+
+		ret.push_back(s);
+	}
+
+	return ret;
+}
+
+int main(void) {
+
+	std::string s;
+	while (getline(std::cin, s)) {
+
+		std::vector<std::string> vec = split(s);
+
+		vec = frame(vec);
+		for (std::vector<std::string>::const_iterator i = vec.begin();
+		     i < vec.end();
+		     i++) {
+			std::cout << *i << std::endl;
+		}
+	}
+
+	std::string a = "Vai curintia eh nois";
+	std::vector<std::string> v1 = split(a);
+	v1 = frame(v1);
+	std::string b = "Another string test ronaldo";
+	std::vector<std::string> v2 = split(b);
+
+	std::vector<std::string> v3 = hcat(v1, v2);
+	for (std::vector<std::string>::const_iterator i = v3.begin();
+	     i < v3.end();
+	     i++) {
+		std::cout << *i << std::endl;
+	}
+
+	return 0;
+}
diff --git a/CPP/cpp_book/chap6/split_str/text.txt b/CPP/cpp_book/chap6/split_str/text.txt
new file mode 100644
index 0000000..a6436ff
--- /dev/null
+++ b/CPP/cpp_book/chap6/split_str/text.txt
@@ -0,0 +1 @@
+seu corno puto manso
diff --git a/CPP/cpp_book/chap6/student_info.cpp b/CPP/cpp_book/chap6/student_info.cpp
new file mode 100644
index 0000000..a55338b
--- /dev/null
+++ b/CPP/cpp_book/chap6/student_info.cpp
@@ -0,0 +1,34 @@
+#include "student_info.h"
+
+bool compare_students(const StudentInfo& a, const StudentInfo& b)
+{
+	return a.name < b.name;
+}
+
+std::istream& read_homework(std::istream& in, std::vector<double>& hw)
+{
+	if (in) {
+		hw.clear();	// Empty the vector.
+
+		double x;
+		/*
+		 * Loop invariant:
+		 *	- 'homework' contains all the homework grades read so far
+		 */
+		while (in >> x)
+			hw.push_back(x);
+
+		in.clear();	// Clear the stream in case
+				// it will be used again.
+	}
+	return in;
+}
+
+std::istream& read_student(std::istream& is, StudentInfo& s)
+{
+	/* Read and store student's name, midterm and final */
+	is >> s.name >> s.midterm >> s.final;
+
+	read_homework(is, s.homework);
+	return is;
+}
diff --git a/CPP/cpp_book/chap6/student_info.h b/CPP/cpp_book/chap6/student_info.h
new file mode 100644
index 0000000..697f3c0
--- /dev/null
+++ b/CPP/cpp_book/chap6/student_info.h
@@ -0,0 +1,20 @@
+#ifndef STUDENT_INFO_H
+#define STUDENT_INFO_H
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+struct StudentInfo {
+	std::string name;
+	double midterm;
+	double final;
+	std::vector<double> homework;
+};
+
+
+bool compare_students(const StudentInfo& a, const StudentInfo& b);
+std::istream& read_homework(std::istream& in, std::vector<double>& hw);
+std::istream& read_student(std::istream& is, StudentInfo& s);
+
+#endif /* STUDENT_INFO_H */
diff --git a/rust/findurl/Cargo.lock b/rust/findurl/Cargo.lock
new file mode 100644
index 0000000..e4c345f
--- /dev/null
+++ b/rust/findurl/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "findurl"
+version = "0.1.0"
diff --git a/rust/findurl/Cargo.toml b/rust/findurl/Cargo.toml
new file mode 100644
index 0000000..7a3bc23
--- /dev/null
+++ b/rust/findurl/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "findurl"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/rust/findurl/src/furl.rs b/rust/findurl/src/furl.rs
new file mode 100644
index 0000000..5ce60c1
--- /dev/null
+++ b/rust/findurl/src/furl.rs
@@ -0,0 +1,7 @@
+pub fn find_urls(urls: &mut Vec<String>) -> () {
+
+    urls.push("Ronaldo".to_string());
+    for i in urls {
+        println!("{i}");
+    }
+}
diff --git a/rust/findurl/src/main.rs b/rust/findurl/src/main.rs
new file mode 100644
index 0000000..1723df4
--- /dev/null
+++ b/rust/findurl/src/main.rs
@@ -0,0 +1,27 @@
+mod furl;
+
+fn main() {
+    let mut s = String::new();
+
+    loop {
+
+        match std::io::stdin().read_line(&mut s) {
+            Ok(n) => {
+                if n == 0 {
+                    break;
+                }
+            }
+            Err(_) => panic!(),
+        }
+    }
+
+    let mut urls: Vec<String> = Vec::new();
+
+    furl::find_urls(&mut urls);
+
+    for i in &urls {
+        println!("{i}");
+    }
+
+    println!("{}", s);
+}
diff --git a/rust/findurl/text.txt b/rust/findurl/text.txt
new file mode 100644
index 0000000..1c44e9c
--- /dev/null
+++ b/rust/findurl/text.txt
@@ -0,0 +1,3 @@
+https://www.ronaldo.com
+http://www.xproblems.cc
+gopher://gopher.kaboom