[litteng]

indication of a clutch failure: is the ability to engage a gear while depressing the clutch pedal, release the clutch pedal and nothing happens, cars does not stall and no forward motion

indication of slave cyl failure; is when pushing the clutch pedal down does not disengage the engine from the gearbox, if you have to pump it several times to effect a gear change that also is indicative of a slave cyl failure...

i would suspect master cyl failure would be similar to slave cyl failure

best guess is your clutch is toast...

did it give off any loud noises when engaged but nothing is happening?