在我的应用程序中,我想将通常会转到 stdout 流的输出重定向到我定义的函数。我读到您 可以 将stdio 重定向到文件,那么为什么不重定向到函数呢? 例如: void MyHandler( const char* data ); //<<Magical redirection code>> printf( "test" ); std::cout << "test" << std::endl; //MyHandler should...
#include <stdio.h>intmain(){/* redirect standard output to a file */if(freopen("D:\\OUTPUT.txt","w", stdout)==NULL)//冲定向一个标准输出流,写入文件fprintf(stderr,"error redirecting stdout\n");/* this output will go to a file */printf("This will go into a file.");//流已经...
| 0 | stdin | Standard input | | 1 | stdout | Standard output | | 2 | stderr | Standard error | 标准I/O 文件的重定向: # redirect stdout to output.txt ls > output.txt ls 1> output.txt # append stdout to output.txt ls -l >> output.txt # redirect stderr to err.txt grep ...
#include <stdio.h> int main() { FILE *file = fopen("error.log", "w"); if (file == NULL) { perror("Failed to open file"); return 1; } // 将stderr重定向到文件 if (freopen("error.log", "w", stderr) == NULL) { perror("Failed to redirect stderr"); return 1; } //...
To redirect stdout to the Log window, issue the following command: SET INTERCEPT ON FILE stdout ;With this SET command, you will capture not only stdout from your program, but also from interactive function calls. For example, you can interactively call printf on the command line to display...
freopen("data.out","w",stdout); 这样就把标准输入重定向到了data.in文件,标准输出重定向到了data.out文件。 这两句代码之后,scanf函数就会从data.in文件里读,而printf函数就会输出到data.out文件里了。 代码示例: [cpp]view plain copy ...
clearerr(stdout); fsetpos(stdout, &pos); /* for C9X */ printf("stdout again\n"); } You can compile it with gcc. If you save it in a file with .cpp as extenstion name and compile the cpp file with g++, you need to include unistd.h. Add the following additional line....
把原本输出到屏幕的内容输出到文件，称为输出重定向。例如，先在当前路径下生成"i.txt"文件，并在其中存入”abcd“，在”CMD“窗口中，输入”redirect <i.txt“回车，程序将不再要求键盘输入，而直接输出”the input was abcd“。如在”CMD“窗口中，输入”redirect test.txt“，程序将生成文件”test...
判断逻辑很简单，但是重定向的时候需要前台有消息提示，如果是在Controller中，可以在方法上注入...
std::stringstrTmpCmd = m_strCmd +"2>&1";//重定向stderr至stdoutif((m_hChildProcess = rgpopen(strTmpCmd.c_str(),"r")) ==NULL) { fprintf(stderr,"rgpopen error\n");return-1; }while(m_bAbort ==false) {if(fgets(line,1024, m_hChildProcess) ==NULL)break;if(pFunc) pFunc(li...