Compilare: user.cpp: In function ‘int main()’: user.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(V.size()<M) ^ user.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++) ^ user.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>0&&i<V.size()) ^ user.cpp:63:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<V.size()-2) ^ user.cpp:72:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(V.size()<M) ^ user.cpp: In function ‘void r(int&)’: user.cpp:19:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==MAX)fread(f,1,MAX,stdin),pos=0; ^ user.cpp:24:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==MAX)fread(f,1,MAX,stdin),pos=0; ^ user.cpp: In function ‘int main()’: user.cpp:29:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi5.in","r",stdin); ^ user.cpp:30:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi5.out","w",stdout); ^ user.cpp:32:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&p,&N,&M); ^ user.cpp:34:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^