Compilare: user.cpp: In function ‘int main()’: user.cpp:64:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:66:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", v + i); ^ user.cpp:67:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &m); ^ user.cpp:69:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &tip, &val); ^ user.cpp: In function ‘int cb1(int, int, int)’: user.cpp:33:6: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] int m; ^ user.cpp: In function ‘int cb2(int, int, int)’: user.cpp:49:6: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] int m; ^ user.cpp: In function ‘int main()’: user.cpp:33:6: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] int m; ^ user.cpp:49:6: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] int m; ^