[perfectboy]

Check if your are using latest version of the samp include .

You may also refer this https://sampwiki.blast.hk/wiki/SetPVarInt

and make sure the variable inputtext is of integer type

(playerid, varname[], int_value)
playerid The ID of the player whose player variable will be set.
varname The name of the player variable.
int_value The integer to be set.