软件工程——字符串操作

#include
	int main(){
	char sentence[100];
	int len=0,j,wordlen=0;
	gets(sentence);
	while(sentence[len]) len++;
	for(j=len-1;j>=0;j--){
	if(sentence[j]>='a'&&sentence[j]<='z'||sentence[j]>='A'&&sentence[j]<='Z')
	{
	wordlen++;
	}
	else if(wordlen>0){
	printf("%*.*s",wordlen,wordlen,&sentence[j+1]);
	printf("%c",sentence[j]);
	wordlen=0;
	}
	else
	printf("%c",sentence[j]);
	}
	if(wordlen>0)
	printf("%*.*s",wordlen,wordlen,sentence);
	return 0;
	}