jakelamon Posted November 3, 2012 Report Share Posted November 3, 2012 Hey all, I have a pretty basic C program - where I want to read a value and return the value back based on a keypress, I can write out the value within the program fine, but having trouble understanding the read/write combo. So for example if I wanted to do: if (FSUIPC_Read(0x53C1, 1 AP, &dwResult)) || (FSUIPC_Write(0x53C1, 1, AP, &dwResult)) FSUIPC_Process(&dwResult) I'm having trouble achieving to read and then writing out even if I have the relevant commands in fsuipc_io as well Thanks for any help! Link to comment Share on other sites More sharing options...
Pete Dowson Posted November 5, 2012 Report Share Posted November 5, 2012 if (FSUIPC_Read(0x53C1, 1 AP, &dwResult)) || (FSUIPC_Write(0x53C1, 1, AP, &dwResult)) Since when successful the FSUIPC_Read call returns "TRUE", the FSUIPC_Write function will only ever be called if the Read fails! surely that is the opposite of what you want. Remember, in C conditional combinations are only evaluated as far as is necessary to determine the result. Try && instead of ||. Pete Link to comment Share on other sites More sharing options...
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