Compilare: user.cpp: In function ‘int main()’: user.cpp:64:9: warning: unused variable ‘poz’ [-Wunused-variable] int poz,lg; ^ user.cpp:64:13: warning: unused variable ‘lg’ [-Wunused-variable] int poz,lg; ^ user.cpp: In function ‘void citnum(int&)’: user.cpp:27:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,si); ^ user.cpp:36:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,so); ^ user.cpp: In function ‘int main()’: user.cpp:66:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,si); ^