题解 | #左旋转字符串#

/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 * 
 * @param str string字符串 
 * @param n int整型 
 * @return string字符串
 */
 #include <string.h>
 void reverse(char *nums,int left,int right)
{
	while(left<right)
	{
		int temp=nums[left];
		nums[left]=nums[right];
		nums[right]=temp;
		++left;
		--right;
	}
}  
char* LeftRotateString(char* str, int n ) {
    // write code here
  
	int numssize=strlen(str);
    scanf("%s%d",str,&n);
    if(numssize==0)return "";
	while(n>numssize)
	{
		n=n%numssize;
	}
	reverse(str,0,n-1);
	reverse(str,n,numssize-1);
	reverse(str,0,numssize-1);        

	return str;
}