Compilare: user.cpp: In function ‘int main()’: user.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( lwdt + tmp <= limit -3 ) pos = i; ^ user.cpp:25:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( lwdt <= limit ) fprintf(fout, "%s" , ch); ^ user.cpp:11:59: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( i = 0; i < 27 ; ++i ) fscanf(fin ,"%d", &wdt[i] ); ^ user.cpp:12:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] char c; fscanf(fin, "%c", &c); ^ user.cpp:15:32: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( ch , 1000000 , fin ); ^ user.cpp:16:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" , &limit); fclose(fin); ^