[151] Reverse Words in a String

以單字為單位的reverse string

一直crash，搞半天根本不是pch的問題啊Orz

太蠢 T^T

速度好慢，先降子XD 要準備出門

char * reverseWords(char * s){

int len = strlen(s);

char *middle = malloc (sizeof(char)* (len+1));

char *output = malloc (sizeof(char)* (len+1));

memset(middle, '\0', sizeof(char)*len);

memset(output, '\0', sizeof(char)*len);

char * pch;

pch = strtok (s, " ");

while (pch != NULL)

{

sprintf(output,"%s",pch);

if (strlen(middle)> 0)

sprintf(output, "%s %s",output, middle);

// sprintf(middle,"%s",output);

memcpy(middle, output ,strlen(output));

pch = strtok(NULL, " ");

}

return output;

}