View Compilation Error

0_0_1434114_2085.cpp:1:22:  iostream : No such file or directory
0_0_1434114_2085.cpp: In function `int main()':
0_0_1434114_2085.cpp:10: error: `scanf' undeclared (first use this function)
0_0_1434114_2085.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1434114_2085.cpp: In function `void Read(int)':
0_0_1434114_2085.cpp:17: error: `memset' undeclared (first use this function)
0_0_1434114_2085.cpp:21: error: `getchar' undeclared (first use this function)
0_0_1434114_2085.cpp:24: error: `gets' undeclared (first use this function)
0_0_1434114_2085.cpp:46: error: `printf' undeclared (first use this function)
0_0_1434114_2085.cpp: In function `int Cal(char*)':
0_0_1434114_2085.cpp:68: error: `strlen' undeclared (first use this function)
0_0_1434114_2085.cpp:80: error: `strcmp' undeclared (first use this function)