Compilare: user.cpp: In function ‘int main()’: user.cpp:23:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d%*c",&t); ^ user.cpp:26:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%s%*c",A+1); ^