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Reviewed-on: #6

c++常量类型的确定.cpp

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+//
+// Created by violet on 2026/2/24.
+//
+#include "iostream"
+#include "windows.h"
+int main() {
+    SetConsoleOutputCP(CP_UTF8);
+    long long int i1 = 2212345678;
+    std::cout<<sizeof(i1)<<i1<<std::endl;
+    char a = 3;
+    char b = 32;
+    char c = 16;
+    char d = 17;
+    char e = '5';
+    char f = 126;
+    std::cout << f << std::endl;
+    std::cout <<c<<a<<b<<d<<e<<std::endl;
+}

cin数据输入.cpp

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+//
+// Created by viole on 2026/2/25.
+//
+#include <iostream>
+using namespace std;
+int main() {
+    int num ;
+    cin >> num;
+    cout << num << endl;
+}

字符串.cpp

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+
+//
+// Created by violet on 2026/2/24.
+//
+#include <iostream>
+namespace std {
+    int x =1;
+}
+int main() {
+    int a = 1;
+    auto b = std::x+1;
+    std::cout <<b<< std::endl;
+    return 0;
+}

字符串拼接.cpp

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+//
+// Created by viole on 2026/2/24.
+//
+#include "iostream"
+using namespace std;
+int main() {
+    string a = "1";
+    string b = "12";
+    string c = "13";
+    string d = "14";
+    int e = 12;
+    cout << a+b<<c+d<<a+to_string(e)<< endl;
+    bool b1 = true;
+    return 0;
+}

实型数据类型.cpp

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+//
+// Created by viole on 2026/2/24.
+//
+#include "iostream"
+#include "windows.h"
+using namespace std;
+int main() {
+    SetConsoleOutputCP(CP_UTF8);
+    //float 单精度浮点数，4字节，6-7位的有效位数
+    float num1 = 1234567890;
+    float num2 = 1.234567890;
+    double num3 = 1234567890.1234567890;
+    long double num4 = 1234567890.1234567890;
+    cout<<fixed;
+    cout.width(20);
+    cout<<num1<<endl;
+    cout<<num2<<endl;
+    cout<<sizeof(num2)<<endl;
+    cout<<num3<<","<<sizeof(num3)<<endl;
+    cout<<num4<<","<<sizeof(num4)<<endl;
+
+}

布尔数据类型.cpp

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+//
+// Created by viole on 2026/2/25.
+//
+#include "iostream"
+using namespace std;
+int main() {
+    bool flag = 1;
+    bool flag2 = 0;
+    cout << flag << endl;
+    cout << flag2 << endl;
+}

转义字符.cpp

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+//
+// Created by violet on 2026/2/24.
+//
+//转义字符：将普通的字符使用\作为开头，将其含义进行转换，对照得到ascii表的控制字符的功能
+//\n \t \\ \'\"
+#include "iostream"
+#include "windows.h"
+int main() {
+    SetConsoleOutputCP(CP_UTF8);
+    std::cout<<"aa\tbbbb"<< std::endl;
+    std::cout<<"aa\t\tbbbb"<<std::endl;
+    std::cout<<"aa\taabbbbaabbbb"<<std::endl;
+}