#include <stdio.h>
#include <string.h>
int main() {
char str[] = "In a known to find the longest word in the string assume that the string contains only letters and Spaces the blank space to separate different words";
int maxCount = 0; // 记录最大长度
int index = 0;    // 记录单词尾字符下标
for (int i = 0; i < strlen(str); ++i) {
int count = 0; // 记录新单词长度
while (str[i] != ' ' && str[i]) { // 字符不是空格也不是\0
++i;
++count;
}
if (count > maxCount) {
maxCount = count;
index = i - 1;
    }
}
  printf("最长单词是：");
  for (int i = index - maxCount + 1; i <= index; ++i)
       printf("%c", str[i]);
       printf("\n");
       return 0;
}

#include <stdio.h>
#include <string.h>
int main() {
char str[] = "In a known to find the longest word in the string assume that the string contains only letters and Spaces the blank space to separate different words";
int maxCount = 0; // 记录最大长度
int index = 0;    // 记录单词尾字符下标
for (int i = 0; i < strlen(str); ++i) {
int count = 0; // 记录新单词长度
while (str[i] != ' ' && str[i]) { // 字符不是空格也不是\0
++i;
++count;
}
if (count > maxCount) {
maxCount = count;
index = i - 1;
    }
}
  printf("最长单词是：");
  for (int i = index - maxCount + 1; i <= index; ++i)
       printf("%c", str[i]);
       printf("\n");
       return 0;
}