function Prime_Numbers_Sun(a)x1 = floor(a);count = 1;for i = 1: x1 if isprime(i) == 1 y1(count) = i; count = count + 1; endendS = sum(y1);txt = ['从0到',num2str(a),'之间的所有质数和为',num2str(S)];disp(txt)