Comparing one array

hello, i'm using array store received string serial port. dont know why compare not works. see:

code: [select]


if (rxbuffer[3] == '-') value = value * -1;


i wanna check if on rxbuffer[3] has minus symbol convert int negative if receive a  '-';

can me???

is rxbuffer 2 or 1 dimensional array? how declare it?

if data coming in externally, assurances have going fourth character contains '-'?

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