View Compilation Error

0_0_24227833_21843.cpp: In function 'int main()':
0_0_24227833_21843.cpp:12:10: error: expected ';' before 'a'
 5        a[i][j]=a[i-1][j-1]+a[i-1][j];
          ^
0_0_24227833_21843.cpp:20:14: error: 'else' without a previous 'if'
             }else
              ^
0_0_24227833_21843.cpp:29:1: error: expected '}' at end of input
 }
 ^