与标题所说的一样,我们希望从ASCII值中显示模式中的字符集。我们提出了这个代码,但它不起作用......
for (var i = 1; i < 7; i++) {
for (var j = 46; j < i + 1; j++) {
document.write(String.fromCharCode(j));
}
document.write("<br>");
}
for(var k = 8; k > 1; k--) {
for(var l = 97; l < k - 1; l++){
document.write(String.fromCharCode(l));
}
document.write("<br>");
}
输出应该是这样的:
A
AB
ABC
ABCD
ABCDE
ABCDEF
ABCDEFG
ABCDEFGH
ABCDEFGHI
ABCDEFGH
ABCDEFG
ABCDEF
ABCDE
ABCD
ABC
AB
一
答案 0 :(得分:0)
试试这个..
for (var i = 1; i < 10; i++) {
for (var j = 65; j < 65+i; j++) {
document.write(String.fromCharCode(j));
}
document.write("<br>");
}
for(var k = 10; k > 1; k--) {
for(var l = 97; l < 96+k; l++){
document.write(String.fromCharCode(l));
}
document.write("<br>");
}
结果:
A
AB
ABC
ABCD
ABCDE
ABCDEF
ABCDEFG
ABCDEFGH
ABCDEFGHI
abcdefghi
abcdefgh
abcdefg
abcdef
abcde
abcd
abc
ab
a