Compilare: main.cpp: In function 'void citire()': main.cpp:28:12: warning: variable 'sem' set but not used [-Wunused-but-set-variable] char x,sem,y,z; ^~~ main.cpp:28:16: warning: unused variable 'y' [-Wunused-variable] char x,sem,y,z; ^ main.cpp: In function 'int calculare()': main.cpp:132:13: warning: variable 'c' set but not used [-Wunused-but-set-variable] int x,y,c,nr,m; ^ main.cpp:132:15: warning: variable 'nr' set but not used [-Wunused-but-set-variable] int x,y,c,nr,m; ^~ main.cpp:132:18: warning: unused variable 'm' [-Wunused-variable] int x,y,c,nr,m; ^ main.cpp: In function 'void citire()': main.cpp:38:33: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized] if(!isdigit(x)&&!isdigit(z)) ~~~~~~~^~~