Compilare: user.cpp: In function ‘int main()’: user.cpp:8:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[21]’ [-Wformat=] fscanf(in,"%s ",&cuv); ^ user.cpp:20:30: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[21]’ [-Wformat=] fscanf(in,"%s ",&cuv); ^ user.cpp:8:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%s ",&cuv); ^ user.cpp:20:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%s ",&cuv); ^