View Compilation Error

0_0_21782305_32357.cpp:3:5: error: 'nbsp' declared as reference but not initialized
 int  clique( int n,int *u,bool mat[][55],int size,int &max){
     ^
0_0_21782305_32357.cpp: In function 'int clique(int, int*, bool (*)[55], int, int&)':
0_0_21782305_32357.cpp:15:20: error: 'else' without a previous 'if'
     else if (size>max){
                    ^