Compilare: main.cpp: In function 'int main()': main.cpp:9:13: warning: unused variable 'x' [-Wunused-variable] int i,j,x,x1; ^ main.cpp:9:15: warning: unused variable 'x1' [-Wunused-variable] int i,j,x,x1; ^~ main.cpp:14:26: warning: variable 'stop' set but not used [-Wunused-but-set-variable] int start=1,start1=1,stop=1,stop1=1; ^~~~ main.cpp:14:33: warning: unused variable 'stop1' [-Wunused-variable] int start=1,start1=1,stop=1,stop1=1; ^~~~~