Compilare: user.cpp: In function ‘void afis1(int, int)’: user.cpp:12:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<n&&i<n&&sw==0&&i>0&&j>0) ^ user.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<n&&i<n&&sw==0&&i>0&&j>0) ^ user.cpp:19:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n&&sw==0) ^ user.cpp: In function ‘void afis2(int, int)’: user.cpp:28:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<n&&i<n&&sw==0&&i>0&&j>0) ^ user.cpp:28:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<n&&i<n&&sw==0&&i>0&&j>0) ^ user.cpp:41:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n&&sw==0) ^ user.cpp:46:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1;k<=n;k++) ^ user.cpp: In function ‘void afis3(int, int)’: user.cpp:54:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<n&&i<n&&sw==0&&i>0&&j>0) ^ user.cpp:54:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<n&&i<n&&sw==0&&i>0&&j>0) ^ user.cpp:67:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n&&sw==0) ^ user.cpp:72:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1;k<=n;k++) ^ user.cpp: In function ‘int main()’: user.cpp:82:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:86:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<=n;j++) ^