C language-->> left-handed string

Problem Description:

Suppose there is a string: ABCDE

L-One character get new string Bcdea

L two characters get new string Cdeab

Code implementation:

#include <stdio.h> #include <string.h>void reverse (char *left,char *right) {while (left<right) {char tmp=  *left;  *left=*right;  *right=tmp;  left++; right--; }}void Left_move (char *str,int k,int len) {reverse (str,str+k-1); reverse (str+k,str+len-1); reverse (str,str+len-1);} int main () {char str[]= "ABCDE";/* Original string: abcde*/int k=0; int Len=strlen (str); printf ("Please input rotate several characters:"); scanf ("%d", &k);  while (K>len) {printf ("The number is too large, please re-enter:"); scanf ("%d", &k); } left_move (Str,k,len); printf ("%s\n", str); return 0;}

Results:

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C language-->> left-handed string