Compilare: main.cpp: In function 'int main()': main.cpp:15:87: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("huffman.in","r",stdin),freopen("huffman.out","w",stdout),fgets(t,9,stdin); ^ main.cpp:15:87: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:15:87: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:19:40: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] for(fgets(t,9,stdin),q[i]=N,j=0;t[j]!='\n';j++) ^