一种方法是对文件大小进行统计,将 std::string 和 fread() 的大小调整为 std::string 的 const_cast<char*>() 'ed data() 。这要求 std::string 的数据是连续的,这是标准不需要的,但似乎是所有已知实现的情况。更糟糕的是,如果在文本模式下读取文件,则 std::string 的大小可能与文件大小不同。 一个完...
int main(int argc, char** argv) { std::ifstream ifs("myfile.txt"); std::string content( (std::istreambuf_iterator<char>(ifs) ), (std::istreambuf_iterator<char>() ) ); return 0; } 该声明 std::string content( (std::istreambuf_iterator<char>(ifs) ), (std::istreambuf_itera...
stringstream ss ; ss<<fs.rdbuf(); fs.close();stringstr = ss.str();//read into string}//C++方式,高大上//string的构造用了一个模版函数voidfoo() { std::ifstream ifs(sFileName.c_str()); std::stringstr((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>(0));...
#include<stdio.h>#include<string.h>intmain(){char buffer[256];FILE*pFile;pFile=tmpfile();do{if(!fgets(buffer,256,stdin))break;fputs(buffer,pFile);}while(strlen(buffer)>1);rewind(pFile);while(!feof(pFile)){if(fgets(buffer,256,pFile)==NULL)break;fputs(buffer,stdout);}fclose(pFile);r...
stderr—— 标准错误流(屏幕) 二、库函数 1、File access(文件访问) fclose: 用于关闭文件与流的联系 /* fclose example */#include <stdio.h>int main (){FILE * pFile;pFile = fopen ("myfile.txt","wt");fprintf (pFile, "fclose example");fclose (pFile);//成功返回0,失败返回EOFreturn 0;}...
其实FILE * stream就是用来接收我们要关闭的文件对应的文件指针。 再看一下返回值: 那现在我们就可以关闭上面打开的文件了: 代码语言:javascript 复制 intmain(){//打开文件FILE*pf=fopen("test.txt","w");//相对路径if(NULL==pf){printf("fopen");return1;}//写文件//关闭文件fclose(pf);pf=NULL;retu...
create entries detail create file create folder named create independent br create more jobs create new drafted su create ordinate dimen create pricing module create purchase order create results create shading group create smoke screens create store view create surface-curve create tolerance feat create...
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c code to open float from text file C program not linking to CRT calls memset() for unknown reasons C/C++ : converting std::string to const char* I get the error : left of '.c_str' must have class/struct/union type is 'char *' C# to C++ dll - how to pass strings as In/Out...
int main(){string word;// read until end-of-file, writing each word to a new linewhile (cin >> word)cout << word << endl;return 0;} In thiscase, we read into astringusing the input operator. That operator returns theistreamfrom which it read, and thewhilecondition tests the stre...