Execution of C++ program
• PRE- PROCESSING = expanding macros , muting comment line, #included files are called and saved in (.l) file
• COMPILATION= codes are converted into assembly language instruction and saved with (.s) extension
• ASSEMBLY= convert the assembly language instructions into machine level instruction so that our cpu can understand
• LINKING = all the ( assembly instruction ,machine level instruction and all the files ) get together in the process of linking to execute the code
• COMPILATION= codes are converted into assembly language instruction and saved with (.s) extension
• ASSEMBLY= convert the assembly language instructions into machine level instruction so that our cpu can understand
• LINKING = all the ( assembly instruction ,machine level instruction and all the files ) get together in the process of linking to execute the code
First program...
#included < iostream >
using namespace std;
int main()
{
cout<<"Welcome to the upcoming programer page :)";
return 0;
}
using namespace std;
int main()
{
cout<<"Welcome to the upcoming programer page :)";
return 0;
}
C++ Comments
comments are the line of statement which is ignored by the compiler while executing the source code .
Example..
#included < iostream >
using namespace std;
int main()
{
cout<<"Welcome to the upcoming programer page :)"; // print welcome to the upcoming programer page
return 0;
}
using namespace std;
int main()
{
cout<<"Welcome to the upcoming programer page :)"; // print welcome to the upcoming programer page
return 0;
}
The compiler will ignore the line / sentence ( print welcome to the upcoming programer page)
How to implement a comment
/* This is a comment */
/* C++ comments can also
be of multiple lines
*/
// single line comment
Download all my written source code..
Data Type
Data types are declared before the varibale name and they are used to assign memory to the variable in which when the compiler execute the source code then it assign memory to the varibale accordin to the declared data type to it .
| Data Types | Memory Size | Range |
|---|---|---|
| char | 1 byte | -128 to 127 |
| signed char | 1 byte | -128 to 127 |
| unsigned char | 1 byte | 0 to 127 |
| short | 2 byte | -32,768 to 32,767 |
| signed short | 2 byte | -32,768 to 32,767 |
| unsigned short | 2 byte | 0 to 32,767 |
| int | 2 byte | -32,768 to 32,767 |
| signed int | 2 byte | -32,768 to 32,767 |
| unsigned int | 2 byte | 0 to 32,767 |
| short int | 2 byte | -32,768 to 32,767 |
| signed short int | 2 byte | -32,768 to 32,767 |
| unsigned short int | 2 byte | 0 to 32,767 |
| long int | 4 byte | |
| signed long int | 4 byte | |
| unsigned long int | 4 byte | |
| float | 4 byte | |
| double | 8 byte | |
| long double | 10 byte |
HTML defines a long list of available inline tags, a complete list of which can be found on the Mozilla Developer Network.
Primitive data types & Non-primitive data types
Primitive data types - includes byte , short , int , long , float , double , boolean and char.
Non-primitive data types - such as String , Arrays and Classes