Compilare: main.cpp: In function 'int read()': main.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:50:9: warning: unused variable 'pos' [-Wunused-variable] int pos = 1; ^~~ main.cpp: In function 'void Read(int&)': main.cpp:25:42: 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, IN), pos = 0; ^ main.cpp:30:42: 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, IN), pos = 0; ^ main.cpp: In function 'int main()': main.cpp:47:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("k1.out", "w", stdout); ^ main.cpp:52:22: warning: iteration 10009 invokes undefined behavior [-Waggressive-loop-optimizations] while(frecv[i] > 0){ ~~~~~~~^ main.cpp:51:22: note: within this loop for(int i = 1; i <= SMAX; i++){ ~~^~~~~~~