Problem 1411. Number of lattice points within a circle

Solution 1855883

Submitted on 23 Jun 2019 by David Hill

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Test	Status	Code Input and Output
1	Pass	assert(isequal(within_circle(1),5))
2	Pass	assert(isequal(within_circle(3),9))
3	Pass	assert(isequal(within_circle(20),69))
4	Pass	assert(isequal(within_circle(45),145))
5	Pass	assert(isequal(within_circle(55),177))
6	Pass	assert(isequal(within_circle(500),1581))
7	Pass	assert(isequal(within_circle(10000),31417))
8	Pass	assert(isequal(within_circle(50000),157093))
9	Pass	assert(isequal(within_circle(999999),3141521))
10	Pass	assert(isequal(within_circle(9999999),31415993))
11	Pass	assert(isequal(within_circle(99999999),314159017)) % Approaching to Pi...
12	Pass	filetext = fileread('within_circle.m'); assert(isempty(strfind(filetext, 'switch'))) assert(isempty(strfind(filetext, 'case'))) assert(isempty(strfind(filetext, 'if')))