Compilare: main.cpp: In function 'int main()': main.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < poz.size() ; i++) ~~^~~~~~~~~~~~ main.cpp:17:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%s", s1+1) ; ^ main.cpp:18:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%s", s2+1) ; ^