iepuri.cpp: In function `void citire()': iepuri.cpp:18: `i' undeclared (first use this function) iepuri.cpp:18: (Each undeclared identifier is reported only once for each function it appears in.) iepuri.cpp:20: `x' undeclared (first use this function) iepuri.cpp:21: `y' undeclared (first use this function)