Compilare: main.cpp: In function 'int main()': main.cpp:9:6: warning: statement has no effect [-Wunused-value] c==0; ~^~~ main.cpp:24:34: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d\n",(lit-1)/(cuv-1)); ^ main.cpp:6:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("text.in","r",stdin); ^ main.cpp:7:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("text.out","w",stdout); ^ main.cpp:22:5: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] if(c==0 && isalpha(a)!=0) ^~