[First commit]

Basic caesar encryption.

.gitignore

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+.vscode/

caesar.cpp

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+#include "caesar.hpp"
+#include <string>
+
+Caesar::Caesar(int rotation) {
+	setRotation(rotation);
+}
+
+void Caesar::setRotation(int rotation) {
+	this->rotation = rotation;
+}
+
+int Caesar::getRotation() {
+	return rotation;
+}
+
+char Caesar::encryptChar(char toEncrypt) {
+	char newChar = toEncrypt + rotation;
+
+	if(newChar > MAX) newChar -= MAX;
+
+	if(newChar < MIN) newChar += MIN;
+
+	return newChar;
+}
+
+std::string Caesar::encryptString(std::string toEncrypt) {
+	std::string encrypted = "";
+
+	for(int i = 0; i < toEncrypt.length(); i++) {
+		encrypted += encryptChar(toEncrypt[i]);
+	}
+
+	return encrypted;
+}

caesar.hpp

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+#ifndef CAESAR_H
+#define CAESAR_H
+
+#include <string>
+
+class Caesar {
+	public:
+		Caesar(int rotation);
+		void setRotation(int rotation);
+		int getRotation();
+		char encryptChar(char toEncrypt);
+		std::string encryptString(std::string toEncrypt);
+	private:
+		int rotation;
+		const int MIN = 33;
+		const int MAX = 126;
+};
+
+#endif

main.cpp

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+#include <string>
+#include <iostream>
+#include "caesar.hpp"
+
+const std::string usage = "caesar <rotation> <text to encrypt>";
+
+int main(int argc, char* argv[]) {
+	if(argc < 3) { 
+		std::cout << usage << std::endl;
+		return 1;
+	}
+
+	int rotation = std::stoi(argv[1]);
+	std::string toEncrypt = "";
+
+	for(int i = 2; i < argc; i++) {
+		toEncrypt += argv[i];
+		if(i < argc - 1) toEncrypt += " ";
+	}
+
+	Caesar caesar{rotation};
+	std::cout << caesar.encryptString(toEncrypt) << std::endl;
+	
+	return 0;
+}

makefile

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+
+CXX = g++
+
+CXXFLAGS = -std=c++11 -Wall
+
+TARGET = caesar
+
+SRCS = main.cpp caesar.cpp
+
+OBJS = $(SRCS:.cpp=.o)
+
+$(TARGET): $(OBJS)
+	$(CXX) $(CXXFLAGS) $(OBJS) -o $(TARGET)
+
+%.o: %.cpp
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+clean:
+	rm -f $(OBJS) $(TARGET)
+
+.PHONY: clean