Compilare: user.cpp: In function ‘bool del(int)’: user.cpp:68:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:88:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[305]’ [-Wformat=] fscanf(f, "%s\n", &v); ^ user.cpp:96:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[305]’ [-Wformat=] fscanf(f, "%s\n", &v); ^ user.cpp:85:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &n); x = n; ^ user.cpp:88:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s\n", &v); ^ user.cpp:94:26: 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:96:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s\n", &v); ^