Compilare: user.cpp: In function ‘int main()’: user.cpp:18:27: warning: unused variable ‘i’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^ user.cpp:18:34: warning: unused variable ‘j’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^ user.cpp:18:41: warning: unused variable ‘xx’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^ user.cpp:18:49: warning: unused variable ‘yy’ [-Wunused-variable] int r = 5, c = 4, i = 0, j = 0, xx = 0, yy = 0; ^