【字符串函数】Y - Wow! Such Doge! HDU - 4847

#iostream
isalpha(ch);  小写字母返回2 大写字母返回1 其他返回0
islower() || isupper()  返回 1 / 0
tolower 字母转小写, 非字母不操作
toupper 转大写

#cstring
strncmp(a + i, b + j, n) 字符数组前几位比较



#include <iostream>
#include <cstring>
using namespace std;

char s[1000010];

int main()
{
	int ans = 0;
	while (gets(s)) /// 整行输入
	{
		int len = strlen(s);
		for (int i = 0; i < len; i++)
			s[i] = tolower(s[i]);

		for (int i = 0; i < len; i++)
			if (strncmp(s + i, "doge", 4) == 0)
				ans++;
	}
	cout << ans << endl;
	return 0;
}

Input

An article that Doge wants to know.
The size of the article does not exceed 64KB. The article contains only ASCII characters.

Output

Please output the number of word “doge” (case-insensitive). Refer to the samples for more details.

Sample Input

adoge

cutedo

yourge

blownDoge

lovelyDooge

Wow! Such Dooooooooooooooge!!!

D0ge

dOge DOGE

dogedoge

Sample Output

6

Source

2014西安全国邀请赛