Compilare: user.cpp: In function ‘void ve(int, int)’: user.cpp:44:11: warning: unused variable ‘b’ [-Wunused-variable] int a,b,c,d; ^ user.cpp:44:13: warning: unused variable ‘c’ [-Wunused-variable] int a,b,c,d; ^ user.cpp:44:15: warning: unused variable ‘d’ [-Wunused-variable] int a,b,c,d; ^ user.cpp: In function ‘int main()’: user.cpp:82:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("countfefete.out","w",stdout); ^ user.cpp: In function ‘unsigned int getint()’: user.cpp:22:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ user.cpp:27:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^