stdio支持

examples/IODemo.cpp

@@ -0,0 +1,41 @@
+#include <bstl/big_integer.hpp>
+#include <bstl/big_decimal.hpp>
+#include <bstl/string.hpp>
+
+#include <iostream>
+
+int main() {
+    using bstl::BigInteger;
+    using bstl::BigDecimal;
+    using bstl::String;
+
+    std::cout << "=== BetterSTL cin/cout Demo ===\n\n";
+
+    // BigInteger 示例
+    std::cout << "BigInteger Example:\n";
+    std::cout << "Enter a large integer: ";
+    BigInteger bi;
+    std::cin >> bi;
+    std::cout << "You entered: " << bi << "\n";
+    std::cout << "Doubled: " << (bi * BigInteger(2)) << "\n\n";
+
+    // BigDecimal 示例
+    std::cout << "BigDecimal Example:\n";
+    std::cout << "Enter a decimal number: ";
+    BigDecimal bd;
+    std::cin >> bd;
+    std::cout << "You entered: " << bd << "\n";
+    std::cout << "Doubled: " << (bd * BigDecimal(2)) << "\n\n";
+
+    // String 示例
+    std::cout << "String Example:\n";
+    std::cout << "Enter a word: ";
+    String str;
+    std::cin >> str;
+    std::cout << "You entered: " << str << "\n";
+    std::cout << "Uppercase: " << str.upper() << "\n";
+    std::cout << "Lowercase: " << str.lower() << "\n\n";
+
+    std::cout << "Demo completed!\n";
+    return 0;
+}