Compilare: user.cpp: In function ‘int main()’: user.cpp:17:23: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[100]’ [-Wformat=] fscanf(f,"\n%s",&s); ^ user.cpp:9:22: 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:17:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"\n%s",&s); ^