Day3

A interesting code I learned today:

目标.打印出：

welcome to bit!!!!

##################

w################!

we##############!!

#include<stdio.h>

#include<string.h>

int main()

{

char arr1[] = "welcome to bit!!!!";

char arr2[] = "##################";

int a = strlen(arr1) - 1, n = a;

printf("%s\n%s\n", arr1,arr2);

for (int m = 0; m < n; m++ , n--)

{

 arr2[m] = arr1[m];

 arr2[n] = arr1[n];

 printf("%s\n", arr2);

}

return 0;

}

bug:

for(int m=0;m<n;m++&&n--)

m++为0，“m++&&n--”左边为假；

这一步，只执行m++，不执行n++