#include<stdio.h> #include<stdlib.h> #include<string.h>  int main() {   char input[]="this is a book";   char output[256]={'/0'};   int i,len;   len=strlen(input);   printf("變換前的字符串為:%s/n",input);   for(i=0;i<len;i++)   {     if(input[0]!=' ')       input[0]-=32;     if(input[i]==' ')       input[i+1]-=32;     output[i]=input[i];   }   printf("變換后的字符串為:%s/n",output);   return 0; }