function bai1
i=0;
while i==0
a=input('Nhap canh a: ');
b=input('Nhap canh b: ');
c=input('Nhap canh c: ');
if (a<b+c) & (b<a+c) & (c<a+b) & (a>0) & (b>0) & (c>0)
i=1;
else
disp('* Ban da nhap sai yeu cau nhap lai *')
end
end
cv= a+b+c;
disp(['Chu vi cua tam giac la: ',num2str(cv)])