与批处理文件重定向一起使用时，fprintf打印奇怪的字符

Question

我有一个批处理文件如下所示

wmic cpu get CurrentClockSpeed > file.txt
program

程序是以下命令的可执行文件

gcc -o program initial_scan.c -lpsapi

下面是initial_scan.c文件

#include <stdio.h>
#include <windows.h>
#include <psapi.h>

#define DIV 1048576
#define WIDTH 7

int main(){


     MEMORYSTATUSEX statex;
     statex.dwLength = sizeof (statex);
     GlobalMemoryStatusEx (&statex);

     PERFORMANCE_INFORMATION statex2;
     statex2.cb=sizeof(statex2);
     GetPerformanceInfo(&statex2,statex2.cb);


     FILE *f=fopen("file.txt","a");
     if(f==NULL){
        printf("error opening the file");
        exit(1);
     }


     fprintf(f,"There is  %*ld percent of memory in use.\n",WIDTH, statex.dwMemoryLoad);
     fprintf(f,"There are %*I64d total MB of physical memory.\n",WIDTH, statex.ullTotalPhys/DIV);
     fprintf(f,"There are %*I64d free  MB of physical memory.\n",WIDTH, statex.ullAvailPhys/DIV);

     fprintf(f,"There is %*d processes currently in the system. \n",WIDTH,statex2.ProcessCount);
     fprintf(f,"There is %*d threads currently in the system. \n",WIDTH,statex2.ThreadCount);

     return 0;


}

当我运行批处理文件时，输出如下

CurrentClockSpeed  
3101               
桔牥⁥獩†††㈠‵数捲湥⁴景洠浥牯⁹湩甠敳മ吊敨敲愠敲††〸㈷琠瑯污䴠⁂景瀠票楳慣敭潭祲മ吊敨敲愠敲††〶〲映敲⁥䴠⁂景瀠票楳慣敭潭祲മ吊敨敲椠⁳††〱‱牰捯獥敳⁳畣牲湥汴⁹湩琠敨猠獹整⹭ഠ吊敨敲椠⁳†ㄠ㘳″桴敲摡⁳畣牲湥汴⁹湩琠敨猠獹整⹭ഠ

当我在没有wmic命令的情况下编译和运行initial_scan.c文件时，我得到了正确的输出，这是我期望从initial_scan.c文件中得到的。批处理文件中有什么问题？

Answer 1

不过，您正在使用ANSI编码来打开/编写您的文件，wmic输出UTF-16，下面是您需要采取的修复措施：

将此添加到您的文件打开部分：

FILE *f = fopen("file.txt", "a, ccs=UTF-16LE");

然后像这样替换你的fprintf：

fwprintf(f,L"...\n", ...);

Answer 2

好的，我能够通过编辑批处理文件来解决这个问题，如下所示

program
wmic cpu get CurrentClockSpeed >> file.txt

">>“将命令输出附加到文件的末尾，而不删除文件中已经包含的信息。