> 不知道为什么，就是加了个不一定是6个数字的处理，修改如下：
> /*
>  ============================================================================
>  Name        : 1001-exponentiation.c
>  Author      : gsj
>  Version     :
>  Copyright   : Your copyright notice
>  Description : Hello World in C, Ansi-style
>  ============================================================================
>  */
> 
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> 
> #define MAX_LENGHT	5*25
> 
> 
> int main(void) {
> 	//input
> 	char szLine[6];
> 	int n;
> 
> 	//output
> 	int result[MAX_LENGHT];
> 
> 	//middle
> 	int a[5];//被乘数
> 	int b[MAX_LENGHT];//乘数
> 	while (scanf("%s%d", szLine, &n) != EOF) {
> 		//loop index
> 		int i, j, k;
> 
> 		//flag
> 		int dflag = 0;
> 		int count = 0, dot = 0;
> 		int length, dotPosition, start,m;
> 		int sLength;
> 		//x^0
> 		if (n == 0) {
> 			printf("1\n");
> 			continue;
> 		}
> 		//initialization
> 		memset(result, 0, MAX_LENGHT * sizeof(int));
> 		memset(b, 0, MAX_LENGHT * sizeof(int));
> 		memset(a, 0, 5 * sizeof(int));
> 		b[0] = 1;
> 
> 		//szLine's length
> 		sLength = strlen(szLine);
> 		//判断有没有小数点
> 		for (i = 0; i < sLength; i++) {
> 			if (szLine[i] == '.' && i != 5)
> 				dflag = 1;
> 		}
> 
> 		//deal with input
> 		j = 0;
> 		for (i = 0; i <= 5; i++) {
> 			if (dflag) {
> 				if (szLine[sLength -1 - i] == '0') {
> 					if (szLine[sLength -2 - i] != '0')
> 						dflag = 0;
> 					dot--;
> 					continue;
> 				}else
> 					dflag = 0;
> 			}
> 
> 			if (szLine[sLength -1 - i] != '.') {
> 				a[j] = szLine[sLength -1 - i] - '0';
> 				count += a[j];
> 				j++;
> 			} else
> 				dot += i;
> 		}
> 
> 		//0^n(n!=1)
> 		if (count == 0) {
> 			printf("0\n");
> 			continue;
> 		}
> 
> 		//1^n
> 		if(count == 1 && a[0] == 1){
> 			printf("1\n");
> 			continue;
> 		}
> 
> 		//multiply
> 		for (k = 0; k < n; k++) {
> 			for (i = 0; i < 5; i++)
> 				for (j = 0; j < MAX_LENGHT; j++)
> 					result[i + j] += a[i] * b[j];
> 
> 			for (i = 0; i < MAX_LENGHT; i++) {
> 				if (result[i] >= 10) {
> 					result[i + 1] += result[i] / 10;
> 					result[i] %= 10;
> 				}
> 			}
> 			if (k == n - 1)
> 				break;
> 			for (i = 0; i < MAX_LENGHT; i++) {
> 				b[i] = result[i];
> 				result[i] = 0;
> 			}
> 
> 		}
> 
> 		//length
> 		length = 0;
> 		for (i = MAX_LENGHT - 1; i >= 0; i--) {
> 			if (result[i]) {
> 				length = i + 1;
> 				break;
> 			}
> 		}
> 
> 		//dot's position
> 		dotPosition = dot * n;
> 		m = length - dot * n;
> 
> 		if (m <= 0) {
> 			printf(".");
> 			for (j = -m; j > 0; j--) {
> 				printf("0");
> 			}
> 
> 		}
> 		start = 0;
> 		for (i = MAX_LENGHT - 1; i >= 0; i--) {
> 			if (i == dotPosition - 1 && m > 0)
> 				printf(".");
> 			if (start == 1)
> 				printf("%d", result[i]);
> 			else if (result[i]) {
> 				printf("%d", result[i]);
> 				start = 1;
> 			}
> 
> 		}
> 		printf("\n");
> 	}
> 	return 0;
> }
> 
AC了还是很开心的 嘎嘎