Compilare: user.cpp: In function ‘int main()’: user.cpp:90:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&N); ^ user.cpp:91:48: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=N;i++){fgets(C[i]+1,30001,f);L[i]=strlen(C[i]+1);L[i]-=(C[i][L[i]]=='\n');} ^