[LeetCode练习题-C语言]168. Excel Sheet Column Title

[LeetCode练习题-C语言]168. Excel Sheet Column Title

题目

Given a positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB 

我的代码

char* convertToTitle(int n) {
    char *result ;
    int j,temp,i =0;
    while(n > 0){
        char c;
        if(n%26 == 0){
            c='Z';
            n=(n-26)/26;
        }
        else{
            c = n%26 -1 +'A';
            n=(n-n%26)/26;
        }
        result[i]= c;
        i++;
    }
    //由于leetcode默认返回值为输入值，所以加以下两句，不然返回结果后几位会为输入的后几位
    int len = strlen(result);
    *(result+i) = *(result+len);
    for(j=0; j < i/2; j++){
        temp = result[j];
        result[j] = result[i-j-1];
        result[i-j-1] = temp;
    }
    return result;
}