Compilare: main.cpp: In function 'int main()': main.cpp:51:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("taxa.out", "w", stdout); ^ main.cpp:53:64: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile, "%hd%hd%hd%hd%hd%hd\n",&N,&M,&l0,&c0,&lf,&cf); ^ main.cpp:54:31: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread (buf,1,3*Nmax,pFile); ^