[Error] expected initializer before ''

明明看起来没问题，但运行的时候就是出这个错误，一直在网上找了很久都没答案

以下是代码

#include
using namespace std;
#include
#define m 8
#define n 7
char X[m]={'0','A','B','C','B','D','A','B'};
char Y[n]={'0','B','D','C','A','B','A'};

int Structure Sequence(int B[a][b],int a,int b)
{
    int i=a;
    int j=b;
    if(i==0||j==0)
        return 0;
    else if(B[i][j]==0)
    {
        cout<<"X[i]"<<"  ";
        Structure Sequence(B,i-1,j-1);
    }
    else if(B[i][j]==1)
    {
        Structure Sequence(B,i-1,j);
    }
    else
        Structure Sequence(B,i,j-1);
}

int main()
{
    int i,j;
    int C[m][n]={0};
    int B[m][n]={0};
    for(i=0;iC[i][0]=0;
    for(j=0;jC[0][j]=0;
    cout<<"标记函数B[i][j]:"<1;i1;jX[i]==Y[j])
            {
                C[i][j]=C[i-1][j-1]+1;
                cout<<"B["<"]["<"]="<<"↖"<<"  ";
                B[i][j]=0;
            }
            else if(C[i-1][j]>=C[i][j-1])
            {
                C[i][j]=C[i-1][j];
                cout<<"B["<"]["<"]="<<"↑"<<"  ";
                B[i][j]=1;
            }
            else
            {
                C[i][j]=C[i][j-1];
                cout<<"B["<"]["<"]="<<"←"<<"  ";
                B[i][j]=-1;
            }
        }
        cout<"优化函数C[i][j]:"<0;i0;j"C["<"]["<"]="<<C[i][j]<<"  ";
        }
        cout<Structure Sequence(B,i,j);
    
    return 0;
}

编译的时候一直出这个错误
[Error] expected initializer before 'Sequence'
求大家教一下

Structure干啥的呢？

抱歉没注意，函数名不能有空格