Compilare: user.cpp: In function ‘int main()’: user.cpp:19:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[30]’ [-Wformat=] fscanf(f,"%s",&a[i]); ^ user.cpp:25:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[30]’ [-Wformat=] fscanf(f,"%s",&a[i]); ^ user.cpp:19:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a[i]); ^ user.cpp:25:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a[i]); ^ user.cpp:28:12: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] afis(m); ^