Compilare: main.cpp: In function 'int main()': main.cpp:34:19: warning: unused variable 'a' [-Wunused-variable] 34 | int i,j,k=0,l,a,b,ok,k1; | ^ main.cpp:34:21: warning: unused variable 'b' [-Wunused-variable] 34 | int i,j,k=0,l,a,b,ok,k1; | ^