疑問 - 有人可以解答這個程式嗎??

[ooCatoo]

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

int main(int argc, char* argv[])
{
char inputStr[100];
char ch;
String s1 = "";
String s2 = "";

printf("input string (length < 100) : ");
gets(inputStr);

for (int i = 0; i < strlen(inputStr); i++) {
ch = inputStr[i];
if (ch == ' ') ch = '*';

if (i % 2 == 0) s1 += ch;
else s2 += ch;
}

printf("output : %s", s1 + s2);
}

參考看看囉！