编程在一个已知的字符串中查找最长单词，假定字符串中只含字母和空格，用空格来分隔单词。

char str[] = "my beautiful teacher is ";

unsigned long int a = 0; //长整型变量

a = strlen(str);

int count = 0, max = 0 ;

for (int i = 0; i < a; i ++) {

if (str[i] != ' ') {

count ++;

continue;

}

max =count > max ? count : max;

count = 0;

}

printf("%d\n",max); //求最大值

printf("最长单词为:");

for (int i = 0; i < a; i ++) {

if (str[i] != ' ') {

count ++;

if (count == max) {

for (int j = i - max ; j <= i ; j ++) {

printf("%c", str[j]);

}

}

continue;

}

count = 0;

}