matlab loops break and continue commands
3 次查看(过去 30 天)
显示 更早的评论
In number theory, a semi-perfect number is a positive integer number that is equal to the sum of its largest three positive divisors, excluding the number itself. For example; 18 is a semiperfect number, the positive divisors of this number are 1,2,3,6,9,18, and the sum of the three largest integer divisors (excluding the number itself) is 3 + 6 + 9 = 18. Write a MATLAB program that checks whether a given number is semi-perfect number.
2 个评论
mehmet kiraccakali
2020-4-9
编辑:mehmet kiraccakali
2020-4-9
n=input('Enter a number ');
sum=0;
for i=n-1:-1:1
if mod(n,i)==0
sum=sum+i;
end
end
if sum==n
fprintf('%d is a semi-perfect number \n',n);
else
fprintf('%d is not a semi-perfect number \n',n);
end
I couldn't solve this question either, I tried to make the solution above. but i don't know how to find the three biggest divisors.
回答(1 个)
Peng Li
2020-4-9
You are almost there. Just need a seperate counter that force the loop to break if it accumulates to 3.
n = input('Enter a number ');
sum = 0;
ind = 0;
for i = n-1:-1:1
if mod(n, i) == 0
sum = sum + i;
ind = ind + 1;
if ind == 3
break;
end
end
end
if sum == n
fprintf('%d is a semi-perfect number \n',n);
else
fprintf('%d is not a semi-perfect number \n',n);
end
7 个评论
Walter Roberson
2020-4-9
sum of its largest three positive divisors
That is why 3 was chosen to compare against.
ind is being used to count how many factors have been found so far.
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!