Compilare: user.cpp: In function ‘void delshell(char**, int&)’: user.cpp:71:7: warning: value computed is not used [-Wunused-value] *s++; ^ user.cpp: In function ‘int main()’: user.cpp:81:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &n); ^ user.cpp:89:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, n + 1, f); ^