View Compilation Error

0_0_5408563_5731.cpp:5: error: expected init-declarator before "using"
0_0_5408563_5731.cpp:5: error: expected `,' or `;' before "using"
0_0_5408563_5731.cpp:6: error: `ll' does not name a type
0_0_5408563_5731.cpp: In function `void init()':
0_0_5408563_5731.cpp:9: error: `c' undeclared (first use this function)
0_0_5408563_5731.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5408563_5731.cpp:10: error: `a' undeclared (first use this function)
0_0_5408563_5731.cpp: In function `int main()':
0_0_5408563_5731.cpp:26: error: `ll' undeclared (first use this function)
0_0_5408563_5731.cpp:26: error: expected `;' before "sum"
0_0_5408563_5731.cpp:35: error: `sum' undeclared (first use this function)
0_0_5408563_5731.cpp:37: error: `c' undeclared (first use this function)
0_0_5408563_5731.cpp:37: error: `a' undeclared (first use this function)