Compilare: user.cpp: In function ‘int main()’: user.cpp:61:19: warning: unused variable ‘l’ [-Wunused-variable] int p, g, i, j, l, c, lin, col, ok, st, dr, mid, ans; ^ user.cpp:61:22: warning: unused variable ‘c’ [-Wunused-variable] int p, g, i, j, l, c, lin, col, ok, st, dr, mid, ans; ^ user.cpp:61:25: warning: unused variable ‘lin’ [-Wunused-variable] int p, g, i, j, l, c, lin, col, ok, st, dr, mid, ans; ^ user.cpp:61:30: warning: unused variable ‘col’ [-Wunused-variable] int p, g, i, j, l, c, lin, col, ok, st, dr, mid, ans; ^ user.cpp:61:35: warning: unused variable ‘ok’ [-Wunused-variable] int p, g, i, j, l, c, lin, col, ok, st, dr, mid, ans; ^ user.cpp:62:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &p, &n); ^ user.cpp:64:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &g); ^ user.cpp:67:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &mat[i][j]); ^