Compilare: user.cpp: In function ‘int main()’: user.cpp:17:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[21]’ [-Wformat=] fscanf(f,"%s",&v[k++]); ^ user.cpp:18:42: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[21]’ [-Wformat=] while(!feof(f)) fscanf(f,"%s",&v[k++]); ^ user.cpp:17:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&v[k++]); ^ user.cpp:18:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] while(!feof(f)) fscanf(f,"%s",&v[k++]); ^