Compilare: user.cpp: In function ‘void calcul()’: user.cpp:29:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(b && i+sol<=n && j+sol<=n) ^ user.cpp:29:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(b && i+sol<=n && j+sol<=n) ^ user.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k<=w) sol++; else b=0;} else b=0; ^ user.cpp: In function ‘void read(int&)’: user.cpp:15:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz==dim) fread(buff,1,dim,stdin),poz=0; ^ user.cpp:19:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz==dim) fread(buff,1,dim,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:38:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plantatii.in","r",stdin);; ^