Compilare: main.cpp: In function 'int main()': main.cpp:25:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&n,&x,&y,&z); ^ main.cpp:27:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^ main.cpp:49:38: warning: 'leni' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"%d %d %d",lenm,leni-lenm+1,leni); ~~~~^~~~~