Compilare: main.c: In function 'main': main.c:6:73: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration] freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),gets(s),gets(u),m=strlen(s),n=strlen(u),strcpy(s+1,s),strcpy(u+1,u); ^~~~ main.c:6:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),gets(s),gets(u),m=strlen(s),n=strlen(u),strcpy(s+1,s),strcpy(u+1,u); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:38: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),gets(s),gets(u),m=strlen(s),n=strlen(u),strcpy(s+1,s),strcpy(u+1,u); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ./ccwn46Xr.o: In function `main': main.c:(.text.startup+0x44): warning: the `gets' function is dangerous and should not be used.