Compilare: main.c: In function 'main': main.c:36:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:37:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:41:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(A,LSir,stdin); ^~~~~~~~~~~~~~~~~~~ main.c:42:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(B,LSir,stdin); ^~~~~~~~~~~~~~~~~~~