Compilare: main.cpp: In function 'void lee2(int, int (*)[501])': main.cpp:37:10: warning: unused variable 'j' [-Wunused-variable] int i, j, x, y ; ^ main.cpp: In function 'void lee1(int, int (*)[501])': main.cpp:54:10: warning: unused variable 'j' [-Wunused-variable] int i, j, x, y ; ^ main.cpp: In function 'int main()': main.cpp:79:10: warning: unused variable 'm' [-Wunused-variable] int n, m, p, i, j, g, elem, st, dr, mid ; ^ main.cpp:79:25: warning: unused variable 'elem' [-Wunused-variable] int n, m, p, i, j, g, elem, st, dr, mid ; ^~~~ main.cpp:80:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &p ) ; ^ main.cpp:82:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &g ) ; ^ main.cpp:84:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &n) ; ^ main.cpp:87:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &mat[i][j]) ; ^