size_t fwrite( const void *buffer, size_t size, size_t count, FILE *stream ); (C99 前) size_t fwrite( const void *restrict buffer, size_t size, size_t count, FILE *restrict stream ); (C99 起) 从给定数组 buffer 向输出流 stream 写入count 个对象。各个对象的写入,如同将每个对象...
std::size_t fwrite( const void* buffer, std::size_t size, std::size_t count, std::FILE* stream );写count 个来自给定数组 buffer 的对象到输出流 stream。如同将每个对象判读为 unsigned char 的数组,并对每个对象调用 size 次std::fputc 以将那些 unsigned char 按顺序写入 stream 一般写入。该流...
fclose std::fclose From cppreference.com <cpp |io |c Defined in header<cstdio> intfclose(std::FILE*stream); Closes the given file stream. Any unwritten buffered data are flushed to the OS. Any unread buffered data are discarded....
#include <stdio.h> enum { SIZE = 5 }; int main(void) { const double a[SIZE] = {1.0, 2.0, 3.0, 4.0, 5.0}; printf("Array has size %ld bytes, element size: %ld\n", sizeof a, sizeof *a); FILE *fp = fopen("test.bin", "wb"); // must use binary mode fwrite(a, size...
这六大组件的交互关系:container(容器) 通过 allocator(配置器) 取得数据储存空间,algorithm(算法)通过 iterator(迭代器)存取 container(容器) 内容,functor(仿函数) 可以协助 algorithm(算法) 完成不同的策略变化,adapter(配接器) 可以修饰或套接 functor(仿函数) 序列式容器: vector-数组,元素不够时再重新分配内存...
*/ FILE * fp = fopen("test.bin", "wb"); fwrite(A,sizeof(double),SIZE,fp); fclose (fp); /* 读取浮点值到数组 B。 */ double B[SIZE]; fp = fopen("test.bin","rb"); long int pos = ftell(fp); /* 位置指示器在文件起始 */ if (pos == -1L) { perror("ftell()"); ...
7.19.8.1 The fread function (p: 301) C89/C90 standard (ISO/IEC 9899:1990): 4.9.8.1 The fread function 参阅 scanffscanfsscanfscanf_sfscanf_ssscanf_s(C11)(C11)(C11) 从stdin、文件流或缓冲区读取格式化输入(函数) fgets 从文件流获取一个字符串(函数) fwrite 写入到文件(函数) fread 的 C++ 文...
intfwrite(constvoid*buffer,std::size_tsize,std::size_tcount,std::FILE*stream); Writes up tocountobjects from the given arraybufferto the output streamstreamas if by reinterepreting each object as an array ofunsignedcharand callingstd::fputcsizetimes for each object to write thoseunsignedchars...
=NULL,"fopen()", __LINE__);constintwrite_count=std::fwrite(A, sizeof(double), SIZE, file);check(write_count==SIZE,"fwrite()", __LINE__);std::fclose(file);// Read the FP values into array B.doubleB[SIZE];file=std::fopen(fname,"rb");check(file!=NULL,"fopen()", __LINE...
(intc, FILE*stream);size_t fread(void*ptr, size_t size, size_t nmemb, FILE*stream);size_t fwrite(constvoid*ptr, size_t size, size_t nmemb, FILE*stream);intfgetpos(FILE*stream, fpos_t*pos);intfseek(FILE*stream,longintoffset,intwhence);intfsetpos(FILE*stream,constfpos_t*pos);...