View Compilation Error

0_0_13494044_25422.c: In function 'main':
0_0_13494044_25422.c:18:19: error: expected expression before '/' token
                   //printf("%d+%d+%d+%d=  ",x[i][j],x[j][n-2*i-1+i],x[n-1+-j][i],x[n-2*i-1+i][n-1-j]);
                   ^
0_0_13494044_25422.c:19:19: error: expected expression before '/' token
                   //printf("%d~%d\n\n",s,j-i);
                   ^