UVA - 621 Secret Research

题目大意： 求给出的数字是哪一种编码

解题思路：用数组存储，然后在进行比较

#include<cstdio>
#include<cstring>

int main() {

	char str[10000];
	int test;
	scanf("%d\n", &test);

	for(int i = 0; i < test; i++) {
		gets(str);	
		int len = strlen(str);

		if(strcmp(str,"1") == 0 || strcmp(str,"4") == 0 || strcmp(str,"78") == 0 ) {
			printf("+\n");
			continue;
		}
		if(len >=2  && str[len - 1] == '5' && str[len - 2] == '3') {
			printf("-\n");		
			continue;
		}
		if(len >= 2 && str[0] == '9' && str[len -1] == '4') {
			printf("*\n");
			continue;
		}
		if(len >= 3 && str[0] == '1' && str[1] == '9' && str[2] == '0') 
			printf("?\n");
		memset(str,'\0',sizeof(str));	
	}

	return 0;
}