Compilare: user.cpp: In function ‘void af()’: user.cpp:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<m;i++) ^ user.cpp: In function ‘int build_b()’: user.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<m;i++) ^ user.cpp:36:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<n-1;i++) ^ user.cpp:42:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=2;j<m;j++) ^ user.cpp:44:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[i][j]<min1) ^ user.cpp:51:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[i][j]<min2) ^ user.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<m;j++) ^ user.cpp:69:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<m;i++) ^ user.cpp:70:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[n-1][i]<min1) ^ user.cpp: In function ‘void tipar()’: user.cpp:77:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<n;i++) ^ user.cpp:79:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<m;j++) ^