Compilare: user.cpp: In function ‘void citire(int&)’: user.cpp:26: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void Dijkstra()’: user.cpp:93: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:121: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:122: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result In file included from /usr/include/stdio.h:910, from /usr/include/c++/4.4/cstdio:45, from /usr/include/c++/4.4/fstream:43, from user.cpp:1: In function ‘size_t fread(void*, size_t, size_t, FILE*)’, inlined from ‘void citire(int&)’ at user.cpp:26: /usr/include/bits/stdio2.h:285: warning: call to ‘__fread_chk_warn’ declared with attribute warning: fread called with bigger size * nmemb than length of destination buffer