View Compilation Error

0_0_2259441_10418.cpp: In function `int main()':
0_0_2259441_10418.cpp:56: error: expected `;' before "d"
0_0_2259441_10418.cpp:72: error: `sum' undeclared (first use this function)
0_0_2259441_10418.cpp:72: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2259441_10418.cpp:74: error: `update' undeclared (first use this function)