Compilare: user.cpp: In function ‘char nextch()’: user.cpp:26:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(o, 1, MAXBUF, fin); ^ user.cpp: In function ‘int main()’: user.cpp:77:22: warning: iteration 10000u invokes undefined behavior [-Waggressive-loop-optimizations] na[i].a = p[i]; ^ user.cpp:76:5: note: containing loop for(int i = 0; i < MAX-5; i++) { ^