求vfp大神解释代码(虽然执完成了行了但有些小地方仍胡涂)比如(n=len(c)/2);(?subs(c,2*i-1,2)clearc="金字大宝塔"n=len(c)/2for i=1to nspace(70-i)for j=1 to isubs(c,2*i-1,2)=inkey (3)endforendfor
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![求vfp大神解释代码(虽然执完成了行了但有些小地方仍胡涂)比如(n=len(c)/2);(?subs(c,2*i-1,2)clearc=](/uploads/image/z/10264548-12-8.jpg?t=%E6%B1%82vfp%E5%A4%A7%E7%A5%9E%E8%A7%A3%E9%87%8A%E4%BB%A3%E7%A0%81%EF%BC%88%E8%99%BD%E7%84%B6%E6%89%A7%E5%AE%8C%E6%88%90%E4%BA%86%E8%A1%8C%E4%BA%86%E4%BD%86%E6%9C%89%E4%BA%9B%E5%B0%8F%E5%9C%B0%E6%96%B9%E4%BB%8D%E8%83%A1%E6%B6%82%EF%BC%89%E6%AF%94%E5%A6%82%EF%BC%88n%3Dlen%28c%29%2F2%EF%BC%89%EF%BC%9B%EF%BC%88%3Fsubs%28c%2C2%2Ai-1%2C2%29clearc%3D%22%E9%87%91%E5%AD%97%E5%A4%A7%E5%AE%9D%E5%A1%94%22n%3Dlen%28c%29%2F2for+i%3D1to+nspace%2870-i%29for+j%3D1+to+isubs%28c%2C2%2Ai-1%2C2%29%3Dinkey+%EF%BC%883%EF%BC%89endforendfor)
求vfp大神解释代码(虽然执完成了行了但有些小地方仍胡涂)比如(n=len(c)/2);(?subs(c,2*i-1,2)clearc="金字大宝塔"n=len(c)/2for i=1to nspace(70-i)for j=1 to isubs(c,2*i-1,2)=inkey (3)endforendfor
求vfp大神解释代码(虽然执完成了行了但有些小地方仍胡涂)比如(n=len(c)/2);(?subs(c,2*i-1,2)
clear
c="金字大宝塔"
n=len(c)/2
for i=1to n
space(70-i)
for j=1 to i
subs(c,2*i-1,2)
=inkey (3)
endfor
endfor
求vfp大神解释代码(虽然执完成了行了但有些小地方仍胡涂)比如(n=len(c)/2);(?subs(c,2*i-1,2)clearc="金字大宝塔"n=len(c)/2for i=1to nspace(70-i)for j=1 to isubs(c,2*i-1,2)=inkey (3)endforendfor
clear
c="金字大宝塔"
n=len(c)/2 && 此处n=5,len(c)是表示取出c这个字符串的长度,c中5个汉字,一个汉字占两个字符,所以len(c)=10,n=len(c)/2=10/2=5
for i=1to n && 循环 i从1到5
space(70-i)
for j=1 to i && 循环 j从1到i
subs(c,2*i-1,2) && subs是取子串函数,subs(c,2*i-1,2)表示取c中,从 2*i-1开始,长度为2(也就是一个汉字)的串;
所以 当i=1时,subs(c,2*i-1,2)=subs(c,2*1-1,2)=subs(c,1,2),也就是第一个汉字金,这个金在输出前,已经输出了space(70-i)=space(69),即69个空格,此处是?所以金在69个空格后输出.
接着再循环i=2,输出68个空格,subs(c,2*i-1,2)=subs(c,2*2-1,2)=subs(c,3,2)=字,之后输出“字字”;之后i=3,输出67个空格,subs(c,2*i-1,2)=subs(c,2*3-1,2)=subs(c,5,2)=字,之后输出“大大大”;i=4,输出66个空格,subs(c,2*i-1,2)=subs(c,2*4-1,2)=subs(c,7,2)=字,之后输出“宝宝宝宝”;i=5,输出65个空格,subs(c,2*i-1,2)=subs(c,2*5-1,2)=subs(c,9,2)=字,之后输出“塔塔塔塔塔”;
=inkey (3)(这句应该是多余的吧)
endfor
endfor