Eroare de compilare: user.cpp: In function ‘void lire(std::vector<std::vector<double> >&)’: user.cpp:5:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define xs x.size() ^ user.cpp:19:21: note: in expansion of macro ‘xs’ for (int i=0; i<xs; i++) ^ user.cpp:22:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<x[i].size(); j++) ^ user.cpp: In function ‘void direct(std::vector<std::vector<double> >&)’: user.cpp:32:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<xs-1; i++) ^ user.cpp:5:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define xs x.size() ^ user.cpp:37:31: note: in expansion of macro ‘xs’ for (int j=i+1; j<xs; j++) ^ user.cpp:5:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define xs x.size() ^ user.cpp:43:27: note: in expansion of macro ‘xs’ for (int j=i+1; j<xs; j++) ^ user.cpp:46:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=i; k<xs+1; k++) ^ user.cpp: In function ‘void invers(std::vector<double>&)’: user.cpp:60:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i+1; j<a[0].size(); j++) ^ user.cpp: At global scope: user.cpp:68:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:75:19: error: too few arguments to function ‘std::ios_base& std::fixed(std::ios_base&)’ cout << fixed(); ^ In file included from /usr/include/c++/4.8/ios:42:0, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/ios_base.h:958:3: note: declared here fixed(ios_base& __base) ^ user.cpp:4:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define as a.size()