学步园

题目连接：http://www.rqnoj.cn/Problem_224.html

解题思路：将对应按键存成常量数组。

#include <stdio.h>
#include <string.h>

const int sign[] = {1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4};
const int N = 205;

int main() {
    char str[N];
    while (gets(str)) {
	int len = strlen(str), cnt = 0;
	for (int i = 0; i < len; i++)
	    if (str[i] == ' ')
		cnt++;
	    else
		cnt += sign[str[i] - 'a'];
	printf("%d\n", cnt);
    }
    return 0;
}