update

C Practice/.vscode/launch.json

@@ -0,0 +1,41 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "C++ Launch",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "enter program name, for example ${workspaceRoot}/a.out",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceRoot}",
+            "environment": [],
+            "externalConsole": true,
+            "linux": {
+                "MIMode": "gdb"
+            },
+            "osx": {
+                "MIMode": "lldb"
+            },
+            "windows": {
+                "MIMode": "gdb"
+            }
+        },
+        {
+            "name": "C++ Attach",
+            "type": "cppdbg",
+            "request": "attach",
+            "program": "enter program name, for example ${workspaceRoot}/a.out",
+            "processId": "${command.pickProcess}",
+            "linux": {
+                "MIMode": "gdb"
+            },
+            "osx": {
+                "MIMode": "lldb"
+            },
+            "windows": {
+                "MIMode": "gdb"
+            }
+        }
+    ]
+}

C Practice/1-34.c

@@ -0,0 +1,18 @@
+#include<stdio.h>
+void hello_world(void)
+{
+    printf("Hello World!\n");
+}
+
+void three_hellos(void)
+{
+    int counter;
+    for(counter=1;counter<=3;counter++)
+    hello_world();
+}
+
+int main(void)
+{
+    three_hellos();
+    return 0;
+}

C Practice/1-35.c

@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[]) {
+	int len=0;
+	char *p=s;
+	while(*p!=0)
+	{
+		len++;
+		p++;
+	}
+}

C Practice/1.1.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+using namespace std;
+
+using namespace std;
+int main(int argc, char *argv[]) {
+	cout << "Size of char: " << sizeof(char) << endl;
+	cout << "Size of int: " << sizeof(int) << endl;
+	cout << "Size of chort int: " << sizeof(short int) << endl;
+	cout << "Size of long int:" << sizeof(long int) << endl;
+	cout << "Size of float: " << sizeof(float) << endl;
+	cout << "Size of double: " << sizeof(double) << endl;
+	cout << "Size of wchar_t : " << sizeof(wchar_t) << endl;
+	return 0;
+}

C Practice/1.2.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+
+using namespace std;
+extern int a,b;
+extern int c;
+extern float f;
+
+int main(int argc, char *argv[]) {
+	int a,b;
+	int c;
+	float f;
+
+	a=10;
+	b=20;
+	c=a+b;
+	cout << c << endl;
+	f=70.0/3.0;
+	cout << f << endl;
+
+	return 0;	
+}

C Practice/1.3.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+
+using namespace std;
+int main(int argc, char *argv[]) {
+	cout << "Hello\tWorld\n\n";
+	return 0;
+}

C Practice/1.4.cpp

@@ -0,0 +1,79 @@
+#include <iostream>
+
+using namespace std;
+
+class Box
+{
+public:
+    double length;
+    double breadth;
+    double height;
+    /*	double getVolume(void){
+    		return length*breadth*height;
+    	}*/
+
+    double getVolume(void);
+    void setLength(double len);
+    void setBreadth(double bre);
+    void setHeight(double hei);
+};
+
+double Box::getVolume(void)
+{
+    return length * height * breadth;
+}
+
+double Box::setLength(double len)
+{
+    length = len;
+}
+
+double Box::setBreadth(double bre)
+{
+    breadth = bre;
+}
+
+double Box::setHeight(double hei)
+{
+    height = hei;
+}
+
+int main(int argc, char *argv[])
+{
+    /*  Box Box1;
+      Box Box2;
+      double volume = 0.0;
+      Box1.height = 5.0;
+      Box1.length = 6.0;
+      Box1.breadth = 7.0;
+
+      Box2.height = 10.0;
+      Box2.length = 12.0;
+      Box2.breadth = 13.0;
+
+      volume = Box1.height * Box1.length * Box1.breadth;
+      cout << "Box1's volume: " << volume << endl;
+
+      volume = Box2.height * Box2.length * Box2.breadth;
+      cout << "Box2's volume: " << volume << endl;
+    */
+    Box Box1 ;
+    Box Box2;
+    double volume;
+
+    Box1.setLength(6.0);
+    Box1.setHeight(5.0);
+    Box1.setBreadth(7.0);
+
+    Box2.setLength(12.0);
+    Box2.setBreadth(13.0);
+    Box2.setHeight(10.0);
+
+    volume=Box1.getVolume();
+    cout << "Box1's volume is :" << volume << endl;
+
+    volume = Box2.getVolume();
+    cout << "Box2's volume is :" << volume << endl;
+
+    return 0;
+}

C Practice/1.5.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+
+using namespace std;
+
+class Line
+{
+public:
+		double length;
+		void setLength(double len);
+		doubel getLength;
+};
+
+double Line::getLength(void)
+{
+	return length;
+}
+
+void Line::setLength(double len)
+{
+	length=len;
+}
+
+int main(int argc, char *argv[]) {
+	Line line;
+
+	line.setLength(6.0);
+
+	cout << "Length of line :" << line.length << endl;
+
+	return 0;
+}

C Practice/1.6.cpp

@@ -0,0 +1,3 @@
+#include <iostream>
+
+using namespace std;