Compilare: main.cpp: In function 'int main()': main.cpp:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(b); i++) ~~^~~~~~~~~~~ main.cpp:23:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == strlen(a)) ~~^~~~~~~~~~~~ main.cpp:13:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s%s", a,b); ^