添加项目文件。

2025-07-01 16:04:35 +08:00
parent 27b960a881
commit 0f8e7d3282
13 changed files with 755 additions and 0 deletions
--- a/ScientificCalculator/Tokenizer.cpp
+++ b/ScientificCalculator/Tokenizer.cpp
@@ -0,0 +1,115 @@
+#include"Tokenizer.h"
+#include<cctype>
+#include<stdexcept>
+
+using namespace std;
+
+vector<Token> Tokenizer::run(const string& expr) {
+	expression = expr;
+	pos = 0;
+	vector<Token> tokens;
+
+    // <20><>ѭ<EFBFBD><D1AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>ʽ
+    while (pos < expression.length()) {
+        skipWhitespace();// <20><><EFBFBD><EFBFBD><EFBFBD>հ<EFBFBD><D5B0>ַ<EFBFBD>
+        if (pos >= expression.length()) break;
+
+        char current = expression[pos];
+
+        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>һԪ<D2BB><D4AA><EFBFBD>ſ<EFBFBD>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+        if (is_dig(current) || (current == '-' && is_UMC(tokens))) 
+            tokens.push_back(readNumber());
+
+        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><C4B8><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+        else if (is_let(current)) 
+            tokens.push_back(readIdentifier());
+
+        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+        else 
+            tokens.push_back(readOperatorOrParen());
+    }
+
+    return tokens;
+}
+
+void Tokenizer::skipWhitespace() {
+    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>пո<D0BF><D5B8><EFBFBD><EFBFBD>Ʊ<EFBFBD><C6B1><EFBFBD><EFBFBD>ȿհ<C8BF><D5B0>ַ<EFBFBD>
+    while (pos < expression.length() && isspace(expression[pos]))
+        ++pos;
+}
+
+Token Tokenizer::readNumber() {
+    size_t start = pos;
+    bool hasDecimal = false;// <20><><EFBFBD><EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD>ֹ<EFBFBD>
+
+    if (expression[pos] == '-')
+        ++pos;  // <20><><EFBFBD><EFBFBD>һԪ<D2BB><D4AA><EFBFBD>ţ<EFBFBD><C5A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+
+    while (pos < expression.length() && (is_dig(expression[pos]) || expression[pos] == '.')) {
+        if (expression[pos] == '.') {
+            if (hasDecimal)
+                throw runtime_error("<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>ʽ<EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>");// С<><D0A1><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><D8B8><EFBFBD><EFBFBD><EFBFBD>
+            hasDecimal = true;
+        }
+        ++pos;
+    }
+
+    string numberStr = expression.substr(start, pos - start);
+    return Token(TokenType::Number, numberStr);// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Token
+}
+
+Token Tokenizer::readIdentifier() {
+    size_t start = pos;
+
+    // <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    while (pos < expression.length() && is_let(expression[pos]))
+        ++pos;
+
+    string name = expression.substr(start, pos - start);
+
+    //ʶ<><CAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    skipWhitespace();
+    if (pos < expression.length() && expression[pos] == '(') 
+        return Token(TokenType::Function, name);
+    else 
+        return Token(TokenType::Variable, name);
+}
+
+Token Tokenizer::readOperatorOrParen() {
+    char c = expression[pos++];  // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8>
+
+    // <20>ж<EFBFBD><D0B6>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>Ͳ<EFBFBD><CDB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ Token
+    switch (c) {
+    case '+': return Token(TokenType::Operator, "+", 1, Associativity::Left);
+    case '-': return Token(TokenType::Operator, "-", 1, Associativity::Left);
+    case '*': return Token(TokenType::Operator, "*", 2, Associativity::Left);
+    case '/': return Token(TokenType::Operator, "/", 2, Associativity::Left);
+    case '^': return Token(TokenType::Operator, "^", 3, Associativity::Right);
+    case '(': return Token(TokenType::LeftParen, "(");
+    case ')': return Token(TokenType::RightParen, ")");
+    default:
+        throw runtime_error(string("δ֪<EFBFBD><EFBFBD><EFBFBD><EFBFBD> ") + c);  // δ֪<CEB4>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>
+    }
+}
+
+bool Tokenizer::is_UMC(const vector<Token>& tokens) {
+    // <20><><EFBFBD><EFBFBD><EFBFBD>Ǳ<EFBFBD><C7B1><EFBFBD>ʽ<EFBFBD><CABD>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD>ǰһ<C7B0><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><C5A3><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ΪһԪ
+    if (tokens.empty()) return true;
+    Token last = tokens.back();
+    return last.is_ope() || last.is_LP();
+}
+
+bool Tokenizer::is_dig(char c) const {
+    // <20>ж<EFBFBD><D0B6>Ƿ<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>
+    return std::isdigit(static_cast<unsigned char>(c));
+}
+
+bool Tokenizer::is_let(char c) const {
+    // <20>ж<EFBFBD><D0B6>Ƿ<EFBFBD>ΪӢ<CEAA><D3A2><EFBFBD><EFBFBD>ĸ
+    return std::isalpha(static_cast<unsigned char>(c));
+}
+
+bool Tokenizer::is_OpeCh(char c) const {
+    // <20>ж<EFBFBD><D0B6>Ƿ<EFBFBD>Ϊ<EFBFBD>Ϸ<EFBFBD><CFB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>
+    return c == '+' || c == '-' || c == '*' || c == '/' || c == '^';
+}