Compilare: user.cpp: In function ‘void ba()’: user.cpp:9:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:10:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<=n; j++) ^ user.cpp:13:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1; k<=n; k++) ^ user.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<=n;j++) ^ user.cpp: In function ‘void bb()’: user.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<=n; j++) ^ user.cpp:35:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1; k<=n; k++) ^ user.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<=n;j++) ^