View Compilation Error

0_0_2046093_3901.cpp: In function `void display()':
0_0_2046093_3901.cpp:56: error: `memset' undeclared (first use this function)
0_0_2046093_3901.cpp:56: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2046093_3901.cpp:138: error: expected primary-expression before "int"
0_0_2046093_3901.cpp:138: error: expected `;' before "int"
0_0_2046093_3901.cpp:171: error: expected `}' at end of input