Compilare: main.c: In function 'main': main.c:7:66: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration] freopen("subsir.in","r",stdin),freopen("subsir.out","w",stdout),gets(x),gets(y),n=strlen(x),m=strlen(y); ^~~~ main.c:7:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("subsir.in","r",stdin),freopen("subsir.out","w",stdout),gets(x),gets(y),n=strlen(x),m=strlen(y); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:33: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("subsir.in","r",stdin),freopen("subsir.out","w",stdout),gets(x),gets(y),n=strlen(x),m=strlen(y); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ./cckFwBWg.o: In function `main': main.c:(.text.startup+0x42): warning: the `gets' function is dangerous and should not be used.