Compilare: main.cpp: In function 'void flip(int (*)[20], int, int)': main.cpp:25:6: warning: unused variable 'sum' [-Wunused-variable] int sum = 0, x, sumpoz = 0, sumneg = 0, maxneg = 0; ^~~ main.cpp:25:15: warning: unused variable 'x' [-Wunused-variable] int sum = 0, x, sumpoz = 0, sumneg = 0, maxneg = 0; ^ main.cpp: In function 'void read(int (*)[20], int&, int&)': main.cpp:85:6: warning: unused variable 'i' [-Wunused-variable] int i, j; ^ main.cpp:85:9: warning: unused variable 'j' [-Wunused-variable] int i, j; ^ main.cpp: In function 'void flip(int (*)[20], int, int)': main.cpp:26:15: warning: 'ind_lin' may be used uninitialized in this function [-Wmaybe-uninitialized] int ind_col, ind_lin; ^~~~~~~ main.cpp:26:6: warning: 'ind_col' may be used uninitialized in this function [-Wmaybe-uninitialized] int ind_col, ind_lin; ^~~~~~~