C++ VC+;中未解决的外部错误+;
我正在学习vc++并用代码检查内存的使用信息。这个程序给了我三个未解决的外部错误C++ VC+;中未解决的外部错误+;,c++,visual-c++,lnk2019,unresolved-external,C++,Visual C++,Lnk2019,Unresolved External,我正在学习vc++并用代码检查内存的使用信息。这个程序给了我三个未解决的外部错误 error LNK2019: unresolved external symbol _GetProcessMemoryInfo@12 referenced in function "void __cdecl PrintMemoryInfo(unsigned long)" (?PrintMemoryInfo@@YAXK@Z) error LNK2019: unresolved external symbol _
error LNK2019: unresolved external symbol _GetProcessMemoryInfo@12 referenced
in function "void __cdecl PrintMemoryInfo(unsigned long)"
(?PrintMemoryInfo@@YAXK@Z)
error LNK2019: unresolved external symbol _EnumProcesses@12 referenced in
function _main
error LNK1120: 2 unresolved externals.
代码::
#include "stdafx.h"
#include <windows.h>
#include <stdio.h>
#include <psapi.h>
// To ensure correct resolution of symbols, add Psapi.lib to TARGETLIBS
// and compile with -DPSAPI_VERSION=1
void PrintMemoryInfo( DWORD processID )
{
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;
// Print the process identifier.
printf( "\nProcess ID: %u\n", processID );
// Print information about the memory usage of the process.
hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID );
if (NULL == hProcess)
return;
if ( GetProcessMemoryInfo( hProcess, &pmc, sizeof(pmc)) )
{
printf( "\tPageFaultCount: 0x%08X\n", pmc.PageFaultCount );
printf( "\tPeakWorkingSetSize: 0x%08X\n",
pmc.PeakWorkingSetSize );
printf( "\tWorkingSetSize: 0x%08X\n", pmc.WorkingSetSize );
printf( "\tQuotaPeakPagedPoolUsage: 0x%08X\n",
pmc.QuotaPeakPagedPoolUsage );
printf( "\tQuotaPagedPoolUsage: 0x%08X\n",
pmc.QuotaPagedPoolUsage );
printf( "\tQuotaPeakNonPagedPoolUsage: 0x%08X\n",
pmc.QuotaPeakNonPagedPoolUsage );
printf( "\tQuotaNonPagedPoolUsage: 0x%08X\n",
pmc.QuotaNonPagedPoolUsage );
printf( "\tPagefileUsage: 0x%08X\n", pmc.PagefileUsage );
printf( "\tPeakPagefileUsage: 0x%08X\n",
pmc.PeakPagefileUsage );
}
CloseHandle( hProcess );
}
int main(void)
{
// Get the list of process identifiers.
DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;
if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
{
return 1;
}
// Calculate how many process identifiers were returned.
cProcesses = cbNeeded / sizeof(DWORD);
// Print the memory usage for each process
for ( i = 0; i < cProcesses; i++ )
{
PrintMemoryInfo( aProcesses[i] );
}
return 0;
}
#包括“stdafx.h”
#包括
#包括
#包括
//为确保符号的正确分辨率,请将Psapi.lib添加到TARGETLIBS
//并使用-DPSAPI_VERSION=1进行编译
无效打印内存信息(DWORD processID)
{
处理hProcess;
进程\内存\计数器pmc;
//打印进程标识符。
printf(“\n进程ID:%u\n”,进程ID);
//打印有关进程内存使用情况的信息。
hproces=OpenProcess(进程\查询\信息|
进程_VM _READ,
FALSE,processID);
if(NULL==hProcess)
返回;
if(GetProcessMemoryInfo(hProcess,&pmc,sizeof(pmc)))
{
printf(“\tPageFaultCount:0x%08X\n”,pmc.PageFaultCount);
printf(“\tPeakWorkingSetSize:0x%08X\n”,
pmc.PeakWorkingSetSize);
printf(“\tWorkingSetSize:0x%08X\n”,pmc.WorkingSetSize);
printf(“\tQuotaPeakPagedPoolUsage:0x%08X\n”,
pmc.QuotaPeakPagedPoolUsage);
printf(“\tQuotaPagedPoolUsage:0x%08X\n”,
pmc.QuotaPagedPoolUsage);
printf(“\tQuotaPeakNonPagedPoolUsage:0x%08X\n”,
pmc.QUOTAPEAKNONPAGEDPOOLUSE);
printf(“\tQuotaNonPagedPoolUsage:0x%08X\n”,
pmc.QuotaNonPagedPoolUsage);
printf(“\tPagefileUsage:0x%08X\n”,pmc.PagefileUsage);
printf(“\tPeakPagefileUsage:0x%08X\n”,
pmc.PeakPagefileUsage);
}
CloseHandle(hProcess);
}
内部主(空)
{
//获取进程标识符的列表。
DWORD APROCESS[1024],CBREQUIRED,CPROCESS;
无符号整数i;
if(!EnumProcesses(a进程、sizeof(a进程)和cbNeeded))
{
返回1;
}
//计算返回了多少进程标识符。
cprocess=cbNeeded/sizeof(DWORD);
//打印每个进程的内存使用情况
对于(i=0;i
尝试添加此
#pragma comment(lib, “psapi.lib”)
编译器使用声明函数的头文件编译代码。不过,链接器确实需要定义所使用的外部函数。通常在导入库中提供。错误消息告诉您链接器没有这样的定义 您必须为
psapi.h
文件包含相应的库
#pragma comment( lib, "psapi.lib" )
编辑::
从
为确保符号的正确分辨率,请将Psapi.lib添加到
TARGETLIBS宏并使用-DPSAPI_VERSION=1编译程序
额外::
<代码>注释>注释>代码,它指示VisualC++在生成的对象文件中留下注释。然后,链接器在处理对象文件时可以读取注释
#pragma comment(lib,libname)
告诉链接器将“libname”库添加到库依赖项列表中,就像您在linker->Input->其他依赖项的项目属性中添加了它一样
请参见MSDN上的为确保符号的正确分辨率,请将Psapi.lib添加到TARGETLIBS并使用-DPSAPI_VERSION=1进行编译
您这样做了吗?@user3471546没问题。)这也可能是kernel32.lib
,具体取决于操作系统版本(根据上的MS文档)。这也可能是kernel32.lib
,具体取决于操作系统版本(根据上的MS文档)。