Compilare: user.cpp:20:21: warning: multi-character character constant [-Wmultichar] while(v[i]=='***') i++; ^ user.cpp:28:14: warning: multi-character character constant [-Wmultichar] v[i]='***'; ^ user.cpp:36:27: warning: multi-character character constant [-Wmultichar] au[++k]=v[i],v[i]='***'; ^ user.cpp:74:50: warning: multi-character character constant [-Wmultichar] while(st1[i].q+st2[j].q==1 or (st1[i].p=='***' or st2[j].p=='***')) ^ user.cpp:74:69: warning: multi-character character constant [-Wmultichar] while(st1[i].q+st2[j].q==1 or (st1[i].p=='***' or st2[j].p=='***')) ^ user.cpp:78:27: warning: multi-character character constant [-Wmultichar] st1[i].p=st2[j].p='***'; ^ user.cpp:81:18: warning: multi-character character constant [-Wmultichar] if(v[i]!='***') ^ user.cpp: In function ‘int main()’: user.cpp:43:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(sir,100000,f); ^