How to get the total 'percentage' of RAM in C ?-CodePudding

Hi I am building an application in C . I want get the percentage of RAM that a windows machine is using. I tried a few codes like:

string getRamUsage()
{
    MEMORYSTATUSEX memInfo;
    memInfo.dwLength = sizeof(MEMORYSTATUSEX);
    DWORDLONG physMemUsed = memInfo.ullTotalPhys - memInfo.ullAvailPhys;

    return to_string(physMemUsed);
}

but it just returns some assembly value. Can I get a solution?

CodePudding user response：

You need to call GlobalMemoryStatusEx to get the data.

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

// it already contains the percentage
auto memory_load = statex.dwMemoryLoad; 

// or calculate it from other field if need more digits.
auto memory_load = 1 - (double)statex.ullAvailPhys / statex.ullTotalPhys;

note: you should check the return value of GlobalMemoryStatusEx in case it fail.