题目：
题解：
bool detectCapitalUse(char * word){ int len = strlen(word); int res = 0; int index = -1; if(len == 1) return true; else{ for(int i = 0; i < len; i++){ if(isupper(word[i])){ res++; index = i; } } } return res == len || res == 0 || (res == 1 && index == 0); }
