View Compilation Error

0_0_6529766_1833.cpp: In function `void isap()':
0_0_6529766_1833.cpp:65: error: `memset' undeclared (first use this function)
0_0_6529766_1833.cpp:65: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6529766_1833.cpp: In function `int main()':
0_0_6529766_1833.cpp:82: error: `memset' undeclared (first use this function)