#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; 
}