左旋转n位字符串

// revertString.cpp : 定义控制台应用程序的入口点。//#include <string.h>#include <stdlib.h>#include <stdio.h>//字符串逆转函数void revertString(char* pStart,char* pEnd){if(pStart!=NULL&&pEnd!=NULL){while(pStart<=pEnd){char tmp=*pStart;*pStart=*pEnd;*pEnd=tmp;pStart++;pEnd--;}}}//左旋转元素，从0至n，到字符串的尾部char* leftRotateString(char* pStr,unsigned int n){if(pStr){int length=static_cast<int>(strlen(pStr));if(length>0 && n>=0){char* pFirstStart=pStr;//起始旋转char* pFirstEnd=pStr+n-1;//旋转结束char* pSecondStart=pStr+n;//不动开始char* pSecondEnd=pStr+length-1;//不动结束revertString(pFirstStart,pFirstEnd);//旋转部分revertString(pSecondStart,pSecondEnd);//不动部分revertString(pFirstStart,pSecondEnd);//整体旋转}}return pStr;}int main(int argc, char* argv[]){char str[]="iloveu";printf("%s/n",leftRotateString(str,2));system("pause");return 1;}