View Compilation Error

0_0_4345857_19003.cpp: In function `int main()':
0_0_4345857_19003.cpp:7: error: expected primary-expression before "int"
0_0_4345857_19003.cpp:7: error: expected `;' before "int"
0_0_4345857_19003.cpp:13: error: redeclaration of `int n1'
0_0_4345857_19003.cpp:13: error: `int n1' previously declared here
0_0_4345857_19003.cpp:18: error: `n2' undeclared (first use this function)
0_0_4345857_19003.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)