Compilare: user.cpp: In function ‘int main()’: user.cpp:9:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] {v[c]++; ^ user.cpp:10:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[c]>=2){printf("1");return 0;}scanf("%c",&c); ^ user.cpp:6:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen("dinozaur.in","r",stdin);freopen("dinozaur.out","w",stdout); ^ user.cpp:6:69: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen("dinozaur.in","r",stdin);freopen("dinozaur.out","w",stdout); ^ user.cpp:7:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ user.cpp:10:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] if(v[c]>=2){printf("1");return 0;}scanf("%c",&c); ^