View Compilation Error

0_0_1965973_4840.cpp:2:21:  string.h : No such file or directory
0_0_1965973_4840.cpp: In function `int main()':
0_0_1965973_4840.cpp:20: error: `strcmp' undeclared (first use this function)
0_0_1965973_4840.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1965973_4840.cpp:28: error: `strcpy' undeclared (first use this function)