Update chapter 7

Author: ShiqiYu

README.md

@@ -44,28 +44,11 @@ Course 'CS205 C/C++ Program Design' in 2021 Fall at Southern University of Scien
 * [Lab notes](week07/Lab07.pptx)
 * [Examples](week07/examples)
 
-## Chapter 8: Speedup Your Program
-
-### Compiler options (-O3 for GCC, -Wall, etc…)
-
-### SIMD (SSE, AVX, NEON, RISC-V, Universal Intrinsics of OpenCV)
-
-### OpenMP
-
-### Memory Hierarchies and Speed
-
-### Crop ROI from a 2D Matrix
-
-### Intel, ARM and RISC-V Architechture 
-
-### Lab:
-
-Create two 1Mx1K float matrices matA and matB, compute matA + matB.
-
-* compute the result row by row and col by col, compare the performance difference
-* use -O3 to improve the speed
-* improve the speed using SIMD, will the speed be improved? Why?
+## [Chapter 8: Speedup Your Program](week08/README.md)
 
+* [Lecture notes](week08/Lecture08.pptx)
+* [Lab notes](week08/Lab08.pptx)
+* [Examples](week08/examples)
 
 ## Chapter 9: Basics of Classes
 

week07/Lecture07.pptx

@@ -8,7 +8,7 @@ float (*norm_ptr)(float x, float y); //norm_ptr is a function pointer
 
 int main()
 {
-    norm_ptr = &norm_l1; //Pointer norm_ptr is pointing to norm_l1
+    norm_ptr = norm_l1; //Pointer norm_ptr is pointing to norm_l1
     cout << "L1 norm of (-3, 4) = " << norm_ptr(-3.0f, 4.0f) << endl;
 
     norm_ptr = &norm_l2; //Pointer norm_ptr is pointing to norm_l2

week07/examples/function-pointer.cpp

@@ -8,7 +8,7 @@ float (&norm_ref)(float x, float y) = norm_l1; //norm_ref is a function referenc
 
 int main()
 {
-    cout << "L1 norm of (-3, 4) = " << norm_ref(-3.0f, 4.0f) << endl;
+    cout << "L1 norm of (-3, 4) = " << norm_ref(-3, 4) << endl;
     return 0;
 }
 

week07/examples/function-reference.cpp

@@ -32,8 +32,8 @@ int main()
     cout << "sum = " << sum(1.1f, 2.2f) << endl;
     cout << "sum = " << sum(1.1, 2.2) << endl;
 
-    // //which function will be called?
-    // cout << "sum = " << sum(1, 2.2) << endl;
+    //which function will be called?
+    cout << "sum = " << sum(1, 2.2) << endl;
 
     return 0;
 }

week07/examples/overload.cpp

@@ -13,7 +13,7 @@ void div2(double val)
 {
 
     cout << "Entering val = " << val << endl;
-    if (val > 0.1)
+    if (val > 1.0)
         div2( val / 2); // function calls itself
     else
         cout << "--------------------------" << endl;

week07/examples/recursion.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <typeinfo>
+using namespace std;
+
+template<typename T>
+T sum(T x, T y)
+{
+    cout << "The input type is " << typeid(T).name() << endl;
+    return x +
+     y;
+}
+// Explicitly instantiate
+template double sum<double>(double, double);
+
+int main()
+{
+    auto val = sum(4.1, 5.2);
+    cout << val << endl;
+    return 0;
+}

week07/examples/template1.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <typeinfo>
+using namespace std;
+
+template<typename T>
+T sum(T x, T y)
+{
+    cout << "The input type is " << typeid(T).name() << endl;
+    return x + y;
+}
+
+int main()
+{
+    // Implicitly instantiates product<int>(int, int)
+    cout << "sum = " << sum<int>(2.2f, 3.0f) << endl;
+    // Implicitly instantiates product<float>(float, float)
+    cout << "sum = " << sum(2.2f, 3.0f) << endl;
+
+    return 0;
+}

week07/examples/template2.cpp

@@ -0,0 +1,22 @@
+
+# Chapter 8: Speedup Your Program
+
+## Compiler options (-O3 for GCC, -Wall, etc…)
+
+## SIMD (SSE, AVX, NEON, RISC-V, Universal Intrinsics of OpenCV)
+
+## OpenMP
+
+## Memory Hierarchies and Speed
+
+## Crop ROI from a 2D Matrix
+
+## Intel, ARM and RISC-V Architechture 
+
+## Lab:
+
+Create two 1Mx1K float matrices matA and matB, compute matA + matB.
+
+* compute the result row by row and col by col, compare the performance difference
+* use -O3 to improve the speed
+* improve the speed using SIMD, will the speed be improved? Why?