Compilare: main.c: In function 'main': main.c:28:14: warning: unused variable 'g' [-Wunused-variable] FILE *f,*g; ^ main.c:30:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:35:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s%s",s1,s2); ^~~~~~~~~~~~~~~~~~~~~~