View Compilation Error

0_0_1644696_21790.cpp: In function `void make(char*, int*)':
0_0_1644696_21790.cpp:15: error: `strlen' undeclared (first use this function)
0_0_1644696_21790.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1644696_21790.cpp: In function `int main()':
0_0_1644696_21790.cpp:47: error: `memset' undeclared (first use this function)
0_0_1644696_21790.cpp:52: error: `strlen' undeclared (first use this function)
0_0_1644696_21790.cpp:52: error: `Strlen' undeclared (first use this function)