fread() fread() is a standard library function in C language for reading data from a file or stream. It is a very powerful and versatile function that is often used to read binary files, but can also be used to read text files. Function prototype: size_t fread(void *ptr, size_t size, size_t count, FILE *stream); Parameters: […]
Tag: fwrite
Standard IO_file reading and writing_fgetc, getchar, ungetc, fgets, fputs, fread, fwrite
Directory 1. Single-character file reading and writing 1.1 Single character read file 1.1.1 fgetc function 1.1.2 getc function 1.1.3 getchar function 1.1.4 ungetc function 1.1.5 Comprehensive sample code for reading single-character files 1.2 Single-character write file 1.2.1 fputc function 1.2.2 putc function 1.2.3 putchar function 1.2.4 Comprehensive sample code for single-character write file 2. Multi-character […]
Standard IO process thread functions: fopen, perror, fclose, fprintf, fscanf, fputc, fgetc, buffer, fputs, fgets, fwrite, fread, fseek, ftell,
Standard IO functions: 1. Stream pointer (FILE*): FILE* fp=fopen(“1.txt”,”r”): This fp is a stream pointer. When this file is opened in read-only mode, a buffer will be applied for at the same time. At this time, the stream pointer fp It will contain the information of the current reading position of the file, if it […]
The content written by fwrite is garbled when the txt is opened. When calling fread again to read txt, the command window will always be stuck.
#include <stdio.h> #include <stdlib.h> #define year 4 //Define the university year as 4 years #define MAX 10 //Define the maximum value typedef //add structure name struct Student{ char name[10]; //store student name int id; int yw[4]; int sx[4]; int yy[4]; } stu; //Modify the structure name stu student[10], temp; //declare student array and temp int […]
File operations and related functions fwrite, fread, fseek, ftell, rwind, feof
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C language file operation, introduction of fopen, fclose, fgetc, fgets, fputc, fputs, fwrite, fread, feof, ferror, fprintf, fscanf and other file functions
Article directory Why use files what is a file file opening and closing file pointer file opening and closing Sequential reading and writing of files Compare a set of functions Random reading and writing of files fseek ftell function rewind function text files and binary files Judgment of the end of file reading misused feof […]
C++ structure data read and write files fopen fclose fwrite wread fseek function details
1. Header file #include 2.fopen() function Call the fopen() function to open or create a file. FILE *fopen(const char *path, const char *mode); path : The parameter path points to the file path, which can be an absolute path or a relative path. mode: The parameter mode specifies the read and write permissions for the […]
[Solved] A wrong use of fwrite() function
fwrite() function declaration: size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream) ptr – This is the pointer to the array of elements to be written. size – This is the size, in bytes, of each element to be written. nmemb – This is the number of elements, each element is size bytes. stream […]