Compilare: user.cpp: In function ‘int main()’: user.cpp:199:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:199:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void read_file()’: user.cpp:48:88: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d%d%d%d%d%d", &p, &n, &m, &t, &panda.l, &panda.c, &codpanda, &biti); ^ user.cpp:55:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &l, &c), a[l][c] = 1; ^ user.cpp:59:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &manca[i][j]); ^ user.cpp: In function ‘void solve_2()’: user.cpp:151:36: warning: ‘mn’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(g, "%d %d", mn - 1, cnt); ^