C language
1- The program execution starts from main method and main method is called by Operating system.
2- In the c-language the predefined support is maintained in the form of header files
Ex:- stdio.h,conio.h
3- the header files contains predefined functions.
Ex:- printf,scanf…..
4- to make available predefined support into our program we have to use #include statement.
Ex:- #include<stdio.h>
5- memory allocation: malloc
Memory deallocation: free
6- size of the data types are varied from operating system to the operating system.
16-bit int -2bytes char- 1byte
32-bit int -4bytes char – 2 bytes
7- to print some statements into the console we have to use “printf” function.
8- C is dynamic language the memory is allocated at compilation time.
C++ language
1- The program execution starts from main method called by operating system.
2- In the cpp language the predefined is maintained in the form of header files.
Ex:- iostream.h
3- The header files contains predefined functions.
Ex:- cout,cin….
4- To make available predefined support into our program we have to use
#include statement.
Ex:- #include<iostream>
5-Allocation :constructor
6- Deallocation:destructors
7- Irrespective of any os
Int -4
Char-2
8- To print the statements we have to use “cout”
Cpp is static language the memory is allocated at compilation time.
Java language
1- The program execution starts from main method called by JVM(java virtual machile).
2- In the java language the predefined is maintained in the form of packages.
Ex:- java.lang java.io java.net java.awt
3- The packages contains predefined classes.
Ex:- String,System
4- To make available predefined support into our program we have to use
import statement.
Ex:- import java.lang.*;
5- Allocation :constructor
6- Deallocation:Garbage collector(part of the jvm)8-Irrespective of any os
Int -4
Char-2
7- To print the statements we have to use “System.out.println”
8- Java is dynamic language the memory is allocated at runtime time
1- The program execution starts from main method and main method is called by Operating system.
2- In the c-language the predefined support is maintained in the form of header files
Ex:- stdio.h,conio.h
3- the header files contains predefined functions.
Ex:- printf,scanf…..
4- to make available predefined support into our program we have to use #include statement.
Ex:- #include<stdio.h>
5- memory allocation: malloc
Memory deallocation: free
6- size of the data types are varied from operating system to the operating system.
16-bit int -2bytes char- 1byte
32-bit int -4bytes char – 2 bytes
7- to print some statements into the console we have to use “printf” function.
8- C is dynamic language the memory is allocated at compilation time.
C++ language
1- The program execution starts from main method called by operating system.
2- In the cpp language the predefined is maintained in the form of header files.
Ex:- iostream.h
3- The header files contains predefined functions.
Ex:- cout,cin….
4- To make available predefined support into our program we have to use
#include statement.
Ex:- #include<iostream>
5-Allocation :constructor
6- Deallocation:destructors
7- Irrespective of any os
Int -4
Char-2
8- To print the statements we have to use “cout”
Cpp is static language the memory is allocated at compilation time.
Java language
1- The program execution starts from main method called by JVM(java virtual machile).
2- In the java language the predefined is maintained in the form of packages.
Ex:- java.lang java.io java.net java.awt
3- The packages contains predefined classes.
Ex:- String,System
4- To make available predefined support into our program we have to use
import statement.
Ex:- import java.lang.*;
5- Allocation :constructor
6- Deallocation:Garbage collector(part of the jvm)8-Irrespective of any os
Int -4
Char-2
7- To print the statements we have to use “System.out.println”
8- Java is dynamic language the memory is allocated at runtime time
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