View Compilation Error

0_0_11844157_18908.cpp:1:20: headset.h: No such file or directory
0_0_11844157_18908.cpp: In function `int readint()':
0_0_11844157_18908.cpp:16: error: `getchar' undeclared (first use this function)
0_0_11844157_18908.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11844157_18908.cpp: In function `void print(int)':
0_0_11844157_18908.cpp:121: error: `printf' undeclared (first use this function)
0_0_11844157_18908.cpp: In function `int main()':
0_0_11844157_18908.cpp:153: error: `scanf' undeclared (first use this function)
0_0_11844157_18908.cpp:173: error: `printf' undeclared (first use this function)