在终端输入一行字母，实现间隔打印

#include <stdio.h>

int main()
{
    int i = 0;
    char str[32] = {0};
    
    gets(str);

    while (str[i] != '\0')
    {
        printf("%c",str[i]);

        i += 2;
    }
        return (0);
}