View Compilation Error

0_0_20876968_14010.cpp: In function 'int main()':
0_0_20876968_14010.cpp:12:4: error: 'a' was not declared in this scope
 if(a[i]>a[j])
    ^
0_0_20876968_14010.cpp:15:1: error: 't' was not declared in this scope
 t=a[j];
 ^
0_0_20876968_14010.cpp:24:1: error: expected '}' at end of input
 }
 ^