viPrintf get parameter

[sean_tan]

I must write a GPIB command viprintf(),and the parameter get from user. the bleow useing viPrintf is right?

 if(InstrumentName_status=viPrintf(instrSession,"TPCSTEMP",stepsize,"\n"<0)        //is right to use 
        return InstrumentName_status; 

there "TPCSTEMP" is a GPIB command ,stepsize is a parameter which ueser define .

and this is not main function,just a son function as a DLL document!

  thank you!

[Makoto · Accepted solution]

Yes I think the return code (VISA status code) will be stored in InstrumentName_status, but this code writing is not good. Ideally storing the return value to a variable and IF condition statement must be separated.

InstrumentName_status = viPrintf(instrSession,"....");

if( InstrumentName_status < 0 ) {

  ... 

}

Plus, this viPrintf call does not reflect the given parameter because there is no "%" identifier. You should write as

InstrumentName_status = viPrintf(instrSession,"TPCSTEMP %d\n", (int)stepsize);

[sean_tan]

thanks I know, I forgot d%.thanks caution!