Compilare: user.cpp: In function ‘int main()’: user.cpp:17:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&m); ^ user.cpp:20:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,1000,f); ^ user.cpp:45:46: warning: ‘luc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(l-1>m)i-=luc+1,lc-=luc,c--; ^