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  • C array length example

    C array length example

    An array is a contiguous group of data items with the same name and data type. In order to get the length of an array, we have used the sizeof operator.

    C Array length example

      
      

    In this section you will learn how to determine the length of
    an array in C.

    An array is a contiguous group of data items with the same name and data
    type. In order to get the length of an array, we have used the sizeof operator. The sizeof operator gives
    the amount of storage, in bytes, required to store an object. This operator
    avoids machine-dependent data sizes in the programs.



    #include
    -
    Coded statements that contain (#)sharp sign are are the
    directives of the preprocessor. In our example #include<stdio.h> is
    an indication for preprocessor of the compiler and it means to include the stdio.h
    header file. 

    <stdio.h>- This is the header file
    due to which standard input/output functions are included to be performed into
    the program. It is necessary to
    include this header file as it is having some inbuilt functions like printf(),
    scanf()
    etc. The angle brackets are used to indicate system include
    files.



    <conio.h>
    - Its a non standard header file that contains clrscr(),
    getch()
    functions.

    void main() - main is the function,
    inside which the compiler looks for the data to compile first. Though this
    method has default return int but the return type can be set to void
    that means now method return type is void and it will return no value.

    clrscr()- It is used to clear the console  screen.



    sizeof(array)/sizeof(int)
    - These are the operators that determines the
    length of the array passed inside the operator parentheses..

    getch()- This function reads each
    character. It holds the console screen and program output on it. Without this
    output on the screen will generate in flash and vanishes.

    Here is the code:



    ARRAYLEN.C





    #include <stdio.h>

    #include <conio.h>

    int array[6]12345};

    void main() {

      clrscr();

      int len=sizeof(array)/sizeof(int);

      printf("Length Of Array=%d", len);

      getch();

    }
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    请编程实现:产生一个int数组,长度为100,并向其中随机插入1-100,并且不能重复(百度了一下,get一种高性能算法,非递归)
  • 原文地址:https://www.cnblogs.com/lexus/p/2517073.html
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