左旋字符串k个字符(三步):
旋转前k个字符串,选择n- k个字符串,旋转整个字符串。
#define _CRT_SECURE_NO_WARNINGS 1 #include<stdio.h> #include <string.h> #include<stdlib.h> void Reverse(char* left, char* right) { while (left < right) { char tmp = *left; *left = *right; *right = tmp; left++; right--; } } int main() { char arr[] = "AABCD"; int k = 0; scanf("%d", &k); int len = strlen(arr); Reverse(arr, arr + k - 1); Reverse(arr + k, arr + len - 1); Reverse(arr, arr + len - 1); printf("%s", arr); system("pause"); return 0; }