题解 | #合并符串#

#include <iostream>
using namespace std;
#define MAX 101
int main() {
    char str1[MAX], str2[MAX];
    while (cin >> str1 >> str2) { // 注意 while 处理多个 case
        char s[2*MAX];
        char *s1 = str1, *s2 = str2;
        int i = 0;
	  
		//s2指向str2的最后一个有效字符
        while (*s2 != 0) s2++;
        s2--;

        while (*s1 != '\0'){
            s[i++] = *s1;
            s[i++] = *s2;
            s2--;
            s1++;
        }
        s[i] = '\0';	//s尾 置字符串结束符\0
        cout << s << endl;
    }
}
// 64 位输出请用 printf("%lld")