Compilare: main.c: In function 'main': main.c:42:8: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration] lA=strlen(A); ^~~~~~ main.c:42:8: warning: incompatible implicit declaration of built-in function 'strlen' main.c:42:8: note: include '<string.h>' or provide a declaration of 'strlen' main.c:35:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:36:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:40:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(A,LSir,stdin); ^~~~~~~~~~~~~~~~~~~ main.c:41:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(B,LSir,stdin); ^~~~~~~~~~~~~~~~~~~