题解 | #替换空格#

class Solution {
public:
	void replaceSpace(char *str,int length) {
		int i=length-1;
		while (i-->=0) {
			if (str[i]==' ') {
				length+=2;
				for (int j=length-1; j>i; j--){
				 str[j]=str[j-2];
				}
				str[i]='%';
				str[i+1]='2';
				str[i+2]='0';
			}
		}
	}
};