Compilare: user.cpp: In function ‘int main()’: user.cpp:15:23: warning: unused variable ‘i’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^ user.cpp:15:30: warning: unused variable ‘j’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^ user.cpp:15:37: warning: unused variable ‘xx’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^ user.cpp:15:45: warning: unused variable ‘yy’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^