请看主函数的注释

用 cin 就 AC 了， scanf 只过了一个点 ？

#include <bits/stdc++.h>
using namespace std;
int n;
char a[15][15], b[15][15], c[15][15], d[15][15];
bool work1()
{
    for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= n; j++)
        b[j][n - i + 1] = a[i][j];
    }
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            if(b[i][j] != c[i][j]) return 0;
    return 1;
}
bool work2()
{
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            b[n - i + 1][n - j + 1] = a[i][j];
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            if(b[i][j] != c[i][j]) return 0;
    return 1;
}
bool work3()
{
	for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            b[n - j + 1][i] = a[i][j];
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            if(b[i][j] != c[i][j]) return 0;
    return 1;
}
bool work4()
{
	for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            b[i][n - j + 1] = a[i][j];
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            if(b[i][j] != c[i][j]) return 0;
    return 1;
}
bool work5()
{
	work4();
	for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            a[i][j] = b[i][j];  
    if(work1()) return 1;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            a[i][j] = b[i][j]; 
    if(work2()) return 1;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            a[i][j] = b[i][j]; 
    if(work3()) return 1;
    return 0;
}
bool work6()
{
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            if(b[i][j] != c[i][j]) return 0;
    return 1;
}
void work()
{
    if(work1()) printf("1");
    else if(work2()) printf("2");
    else if(work3()) printf("3");
	else if(work4()) printf("4");
	else if(work5()) printf("5");
	else if(work6()) printf("6");
	else printf("7");
	return ;
}
int main()
{
//    scanf("%d" , &n);
    cin >> n;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
        {
//            scanf("%s" , &a[i][j]);
            cin >> a[i][j];
            d[i][j] = a[i][j];
        }
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
//            scanf("%s" , &c[i][j]);
            cin >> c[i][j];
    work();
    return 0;
}