how to read data file

C language file read and write operation summaryC Language File operationsI. Reading and writing of standard documents1. Opening of the fileThe open operation of the fopen () file indicates that the user-specified file will be allocated in memory

C Language File operationsI. Reading and writing of standard documents1. Opening of the fileThe open operation of the fopen () file indicates that the user-specified file will be allocated in memory with a single file structure and a pointer to the

C language File read and write operation summary C Language File operation I. Reading and writing of standard documents 1. Open the file The open operation of the fopen () file means that the file specified by the user is allocated a filename in

　　Main content:1. Initial file operation2. Read-only (R,RB)3. Write only (W,WB)4. Append (A, AB)5. Read and write (r+)6. Write-read (w+)7. Additional write read (A +)8. Other methods of operation9. File modification and another way to open a file

In the programming process, file operations are a common problem. In C ++ builder, you can use multiple methods to operate files, I will introduce this in detail in the following parts: 1. C-based file operations; 2. File Operations Based on C ++; 　　

C + + read and write file operation code Constant Value DescriptionFmopenread 0 opens with read-only propertyFmopenwrite 1 opens with write-only propertyFmopenreadwrite 2 opens with read/write propertiesFmsharecompat 0 Compatible FCB mode (the

System callsThe main function of the operating system is to manage hardware resources and provide a good environment for application developers, but the various hardware resources of the computer system are limited, so that every process can be

After the file is opened in the specified working mode, you can read and write the file. The following operations are performed by file type. For different types of text files and binary files, you can read and write files by character or by string.

Open the file and add new data at any time. File *fp;if((fp=fopen("data.txt","a"))==NULL){printf("Create File failure"); exit(1);}fprintf(fp,"[%d, %d]\n", x, y);fclose(fp); Cyclic operations store a lot of data as follows: [29, 35][29, 33][30, 34

Hello, C ++ (5) How to output data to the screen, input data from the screen, and read and write files ?, Hello, read/write2.2 Basic Input/output stream After listening to the self-introduction of helloworld.exe, you know that the task of a C ++