add ch06

zing-dev · zing-dev · commit df2c2e4bbd04 · 2020-05-18T22:47:40.000+08:00
diff --git a/primer/CMakeLists.txt b/primer/CMakeLists.txt
@@ -1,5 +1,5 @@
-
+include_directories(${PROJECT_SOURCE_DIR}/primer/include)
 add_subdirectory(ch01)
 add_subdirectory(ch02)
 add_subdirectory(ch03)
-include_directories(${PROJECT_SOURCE_DIR}/primer/include)
+add_subdirectory(ch06)
diff --git a/primer/ch06/CMakeLists.txt b/primer/ch06/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_executable(exercise6.3 exercise6.3.cpp)
+add_executable(exercise6.4 exercise6.4.cpp)
+add_executable(exercise6.5 exercise6.5.cpp)
+add_executable(exercise6.7 exercise6.7.cpp)
+add_executable(exercise6.8 exercise6.8.cpp)
+add_executable(exercise6.10 exercise6.10.cpp)
diff --git a/primer/ch06/exercise6.10.cpp b/primer/ch06/exercise6.10.cpp
@@ -0,0 +1,21 @@
+//
+// Created by zing on 5/18/2020.
+//
+#include <iostream>
+
+using namespace std;
+
+void swap(int *a, int *b) {
+    int c = *a;
+    *a = *b;
+    *b = c;
+}
+
+int main(int argc, char *argv[]) {
+    int a = 10;
+    int b = 11;
+    cout << "a = " << a << ",b = " << b << endl;
+    swap(&a, &b);
+    cout << "a = " << a << ",b = " << b << endl;
+    return 0;
+}
diff --git a/primer/ch06/exercise6.3.cpp b/primer/ch06/exercise6.3.cpp
@@ -0,0 +1,22 @@
+//
+// Created by zing on 5/18/2020.
+//
+
+#include <iostream>
+using namespace std;
+
+int fact(int val){
+    int ret = 1;
+    while (val > 1){
+        ret *= val--;
+    }
+    return  ret;
+}
+
+int main(int argc, char *argv[]) {
+    cout << fact(1) << endl;
+    cout << fact(2) << endl;
+    cout << fact(3) << endl;
+    cout << fact(4) << endl;
+    return 0;
+}
diff --git a/primer/ch06/exercise6.4.cpp b/primer/ch06/exercise6.4.cpp
@@ -0,0 +1,24 @@
+//
+// Created by zing on 5/18/2020.
+//
+
+#include <iostream>
+
+using namespace std;
+
+int fact(int val) {
+    int ret = 1;
+    while (val > 1) {
+        ret = ret * val;
+        val--;
+    }
+    return ret;
+}
+
+int main(int argc, char *argv[]) {
+    int val = 0;
+    cout << "please in put a number" << endl;
+    cin >> val;
+    cout << fact(val) << endl;
+    return 0;
+}
diff --git a/primer/ch06/exercise6.5.cpp b/primer/ch06/exercise6.5.cpp
@@ -0,0 +1,20 @@
+//
+// Created by zing on 5/18/2020.
+//
+
+#include <iostream>
+
+using namespace std;
+
+int abs(int val){
+    if(val < 0)
+        return -1 *val;
+    return val;
+}
+
+int main(int argc, char *argv[]) {
+    cout << abs(1) << endl;
+    cout << abs(0) << endl;
+    cout << abs(-1) << endl;
+    return 0;
+}
diff --git a/primer/ch06/exercise6.7.cpp b/primer/ch06/exercise6.7.cpp
@@ -0,0 +1,22 @@
+//
+// Created by zing on 5/18/2020.
+//
+
+#include <iostream>
+
+using namespace std;
+
+int increasing() {
+    static int val = 0;
+    return val++;
+}
+
+int main(int argc, char *argv[]) {
+
+    cout << increasing() << endl;
+    cout << increasing() << endl;
+    cout << increasing() << endl;
+    cout << increasing() << endl;
+    cout << increasing() << endl;
+    return 0;
+}
diff --git a/primer/ch06/exercise6.8.cpp b/primer/ch06/exercise6.8.cpp
@@ -0,0 +1,14 @@
+//
+// Created by zing on 5/18/2020.
+//
+
+#include <iostream>
+#include "exercise6.8.h"
+using namespace std;
+int main(int argc, char *argv[]) {
+    print();
+    print();
+    cout << fact(5) << endl;
+    cout << fact(6) << endl;
+    return 0;
+}
diff --git a/primer/ch06/exercise6.8.h b/primer/ch06/exercise6.8.h
@@ -0,0 +1,21 @@
+//
+// Created by zing on 5/18/2020.
+//
+
+#ifndef LEARN_CPP_EXERCISE6_8_H
+#define LEARN_CPP_EXERCISE6_8_H
+
+#include <iostream>
+using namespace std;
+void print(){
+    cout << "hello world"<< endl;
+}
+int fact(int val){
+    int ret = 1;
+    while (val > 1){
+        ret *= val--;
+    }
+    return  ret;
+}
+
+#endif //LEARN_CPP_EXERCISE6_8_H
