程序7

【程序7】
题目：输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数。

        function Statistics1(str) {
            var strcount = 0;
            var spacecount = 0;
            var numcount = 0;
            var othercount = 0;

            for (var i = 0; i < str.length; i++) {
                var tmpstr = str.charAt(i);
                if (tmpstr >= 'a' && tmpstr <= 'z' || tmpstr >= 'A' && tmpstr <= 'Z') {
                    strcount++;
                }
                else if (tmpstr === ' ') {
                    spacecount++;
                }
                else if (tmpstr >= '0' && tmpstr <= '9') {
                    numcount++;
                }
                else {
                    othercount++;
                }
            }
            return { "strcount": strcount, "spacecount": spacecount, "numcount": numcount, "othercount": othercount };
        }

        function Statistics2(str) {
            var strcount = 0;
            var spacecount = 0;
            var numcount = 0;
            var othercount = 0;
            var i = 0;

            while (i < str.length) {
                var tmpstr = str.charAt(i);
                if (tmpstr >= 'a' && tmpstr <= 'z' || tmpstr >= 'A' && tmpstr <= 'Z') {
                    strcount++;
                }
                else if (tmpstr === ' ') {
                    spacecount++;
                }
                else if (tmpstr >= '0' && tmpstr <= '9') {
                    numcount++;
                }
                else {
                    othercount++;
                }
                i++;
            }
            return { "strcount": strcount, "spacecount": spacecount, "numcount": numcount, "othercount": othercount };
        }