模板

base/CMakeLists.txt

@@ -29,4 +29,13 @@ add_executable(queueTest2 zzu/queue/queueTest2.cpp)
 add_executable(LG2278 zzu/queue/LG2278.cpp)
 add_executable(queueTest3 zzu/queue/queueTest3.cpp)
 add_executable(settest zzu/set/settest.cpp)
-add_executable(stest1 dfs/stest1.cpp)
+add_executable(stest1 dfs/stest1.cpp)
+add_executable(inline func/inline.cpp)
+add_executable(firstref quote/firstref.cpp)
+add_executable(sceref quote/sceref.cpp)
+add_executable(functemp template/functemp.cpp)
+add_executable(twotemps template/twotemps.cpp)
+add_executable(twotemp template/twotemp.cpp)
+add_executable(temptempover template/temptempover.cpp)
+add_executable(choices template/choices.cpp)
+add_executable(testtemplate template/testtemplate.cpp)

base/func/inline.cpp

@@ -0,0 +1,25 @@
+//
+// Created by nicemoe on 2021/8/9.
+//
+
+#include  <iostream>
+//inline 使函数内联
+inline double square(double x) {
+    return x * x;
+}
+
+using namespace std;
+
+int main() {
+
+    double a,b;
+    double  c=13.0;
+    a = square(5.0);
+    b = square(4.5 + 7.5);
+    cout << "a = " << a << ", b = " << b <<"\n";
+    cout << "c = " << c;
+    cout <<", c squared = " << square(c++) << "\n";
+    cout << "Now c= " << c << "\n";
+
+    return 0;
+}

base/namespacetest/coordin.h

@@ -0,0 +1,19 @@
+//
+// Created by nicemoe on 2021/8/15.
+//
+
+#ifndef BASE_COORDIN_H
+#define BASE_COORDIN_H
+struct polar{
+    double distance;
+    double angle;
+};
+
+struct rect{
+    double x;
+    double y;
+};
+
+polarrect_to_polar(rect xypos);
+void show_polar(polar dapos);
+#endif //BASE_COORDIN_H

base/namespacetest/file1.cpp

@@ -0,0 +1,14 @@
+//
+// Created by nicemoe on 2021/8/15.
+//
+
+#include  <iostream>
+#include "coordin.h"
+
+using namespace std;
+
+int main() {
+
+
+    return 0;
+}

base/quote/firstref.cpp

@@ -0,0 +1,25 @@
+//
+// Created by nicemoe on 2021/8/9.
+//
+
+#include  <iostream>
+
+using namespace std;
+/*
+ * 引用
+ */
+int main() {
+
+    int rats = 101;
+    int &rodents = rats;
+    cout << "rats = " << rats;
+    cout << ", rodents = " << rodents << endl;
+    rodents++;
+    cout << "rats = " << rats;
+    cout << ", rodents = " << rodents << endl;
+
+    cout << "rats address = " << &rats;
+    cout << ", rodents address = " << &rodents << endl;
+
+    return 0;
+}

base/quote/sceref.cpp

@@ -0,0 +1,30 @@
+//
+// Created by nicemoe on 2021/8/9.
+//
+
+#include  <iostream>
+
+using namespace std;
+
+int main() {
+
+    int rats = 101;
+    int &rodents = rats;
+    cout << "rats = " << rats;
+    cout << ", rodents = " << rodents << endl;
+
+    cout << "rats address = " << &rats;
+    cout << ", rodents address = " << &rodents << endl;
+
+    int bunnies = 50;
+    //只改变了值，没有改变地址
+    rodents = bunnies;
+    cout << "bunnies = " << bunnies;
+    cout << "rats = " << rats;
+    cout << ", rodents = " << rodents << endl;
+
+    cout << "bunnies address = " << &bunnies;
+    cout << ", rodents address = " << &rodents << endl;
+
+    return 0;
+}

base/template/choices.cpp

@@ -0,0 +1,29 @@
+//
+// Created by nicemoe on 2021/8/14.
+//
+
+#include  <iostream>
+
+using namespace std;
+
+template<typename T>
+T lesser(T a, T b) {
+    return a < b ? a : b;
+}
+
+int lesser(int a, int b) {
+    a = a < 0 ? -a : a;
+    b = b < 0 ? -b : b;
+    return a < b ? a : b;
+}
+
+int main() {
+
+    int m = 20, n = -30;
+    double x = 15.5, y = 25.9;
+    cout << lesser(m, n)<< endl;
+    cout << lesser(x, y)<< endl;
+    cout << lesser<>(m, n)<< endl;
+    cout << lesser<int>(x, y)<< endl;
+    return 0;
+}

base/template/functemp.cpp

@@ -0,0 +1,29 @@
+//
+// Created by nicemoe on 2021/8/11.
+//
+
+#include  <iostream>
+
+using namespace std;
+
+template<typename T>
+void Swap(T &a, T &b);
+
+int main() {
+
+    int a = 10, b = 20;
+    Swap(a, b);
+    cout << a << " " << b << endl;
+
+    double m = 21.1, n = 31.1;
+    Swap(m,n);
+    cout << m << " " << n << endl;
+    return 0;
+}
+
+template<typename T>
+void Swap(T &a, T &b) {
+    T temp = a;
+    a = b;
+    b = temp;
+}

base/template/temptempover.cpp

@@ -0,0 +1,58 @@
+//
+// Created by nicemoe on 2021/8/14.
+//
+
+#include  <iostream>
+
+using namespace std;
+
+template<typename T>
+void ShowArray(T arr[], int n);
+
+template<typename T>
+void ShowArray(T *arr[], int n);
+
+struct debts {
+    char name[50];
+    double amount;
+};
+
+int main() {
+
+    int things[6]{
+        13,31,103,301,310,130
+    };
+    struct debts mr_E[3]{
+        {"Ima Wolfe", 2400.0},
+        {"Ura Foxe", 1300.0},
+        {"Iby Stout", 1800.0}
+    };
+    double *pd[3];
+    for (int i = 0; i < 3; ++i) {
+        pd[i] = &mr_E[i].amount;
+    }
+    cout << "Listing Mr. E,s counts of things:\n";
+    ShowArray(things,6);
+    cout <<"Listing Mr. E's debts:\n";
+    ShowArray(pd,3);
+    return 0;
+}
+
+template<typename T>
+void ShowArray(T arr[], int n) {
+    cout << " template A\n";
+    for (int i = 0; i < n; ++i) {
+        cout << arr[i] << ' ';
+    }
+    cout << endl;
+
+}
+
+template<typename T>
+void ShowArray(T *arr[], int n) {
+    cout << " template B\n";
+    for (int i = 0; i < n; ++i) {
+        cout << *arr[i] << ' ';
+    }
+    cout << endl;
+}

base/template/testtemplate.cpp

@@ -0,0 +1,20 @@
+//
+// Created by nicemoe on 2021/8/15.
+//
+
+#include  <iostream>
+using namespace std;
+
+template<class T1,class T2>
+//c++ 11 后置返回类型
+auto gt(T1 x,T2 y) -> decltype(x+y){
+    return x+y;
+}
+int main() {
+
+    int a =20;
+    double c = 30.2;
+    cout  << gt(a,c);
+
+    return 0;
+}

base/template/twotemp.cpp

@@ -0,0 +1,64 @@
+//
+// Created by nicemoe on 2021/8/11.
+//
+
+#include  <iostream>
+
+using namespace std;
+
+template<typename T>
+void Swap(T &a, T &b);
+
+struct job {
+    char name[40];
+    double salary;
+    int floor;
+};
+
+template<>
+void Swap<job>(job &j1, job &j2);
+
+void Show(job &j);
+
+int main() {
+    cout.precision(2);
+    cout.setf(ios::fixed, ios::floatfield);
+
+    int i = 10, j = 20;
+    cout << "i ,j =" << i << " , " << j << endl;
+    Swap(i, j);
+    cout << "Now i ,j =" << i << " , " << j << endl;
+
+    job sue = {"Susan Yaffee", 73000.60, 7};
+    job sidney = {"Sidney Yaffee", 78060.72, 9};
+    Show(sue);
+    Show(sidney);
+    Swap(sue, sidney);
+    cout << "交换后:" << endl;
+    Show(sue);
+    Show(sidney);
+    return 0;
+}
+
+template<typename T>
+void Swap(T &a, T &b) {
+    T temp = a;
+    a = b;
+    b = temp;
+}
+
+template<>
+void Swap<job>(job &j1, job &j2) {
+    double t1;
+    int t2;
+    t1 = j1.salary;
+    j1.salary = j2.salary;
+    j2.salary = t1;
+    t2 = j1.floor;
+    j1.floor = j2.floor;
+    j2.floor = t2;
+}
+
+void Show(job &j) {
+    cout << j.name << ": $" << j.salary << " on floor " << j.floor << endl;
+}

base/template/twotemps.cpp

@@ -0,0 +1,60 @@
+//
+// Created by nicemoe on 2021/8/11.
+//
+
+#include  <iostream>
+
+using namespace std;
+
+template<typename T>
+void Swap(T &a, T &b);
+
+template<typename T>
+void Swap(T *a, T *b, int n);
+
+void Show(int a[]);
+
+const int Lim = 8;
+
+int main() {
+
+    int i = 10, j = 20;
+    cout << "i ,j =" << i << " , " << j << endl;
+    Swap(i, j);
+    cout << "Now i ,j =" << i << " , " << j << endl;
+    int d1[Lim] = {0, 7, 0, 4, 1, 7, 7, 6};
+    int d2[Lim] = {0, 7, 2, 0, 1, 9, 6, 9};
+    Show(d1);
+    Show(d2);
+    cout << "-----------" << endl;
+    Swap(d1, d2, Lim);
+    Show(d1);
+    Show(d2);
+    return 0;
+}
+
+template<typename T>
+void Swap(T &a, T &b) {
+    T temp = a;
+    a = b;
+    b = temp;
+}
+
+template<typename T>
+void Swap(T *a, T *b, int n) {
+    T temp;
+    for (int i = 0; i < n; ++i) {
+        temp = a[i];
+        a[i] = b[i];
+        b[i] = temp;
+    }
+}
+
+void Show(int a[]) {
+    cout << a[0] << a[1] << "/";
+    cout << a[2] << a[3] << "/";
+    for (int i = 4; i < Lim; ++i) {
+        cout << a[i];
+    }
+    cout << endl;
+}