#include<stdio.h>;void main(){ char schar[100]; printf("Please input the string:(Length<100)/n"); //scanf("%s/n",schar); 后面加了 /n 后無法按回車正常結束字符串輸入 scanf("%s",schar); printf("Ok, the first char is %c/n",schar[0]); printf("Ok, the string is %s/n",schar);}