View Compilation Error

0_0_9451672_10036.cpp:1:10: #include expects "FILENAME" or <FILENAME>
0_0_9451672_10036.cpp:2:10: #include expects "FILENAME" or <FILENAME>
0_0_9451672_10036.cpp: In function `int main()':
0_0_9451672_10036.cpp:7: error: `scanf' undeclared (first use this function)
0_0_9451672_10036.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9451672_10036.cpp:9: error: `memset' undeclared (first use this function)
0_0_9451672_10036.cpp:13: error: `strlen' undeclared (first use this function)
0_0_9451672_10036.cpp:74: error: expected primary-expression before '/' token
0_0_9451672_10036.cpp:74: error: `font' undeclared (first use this function)
0_0_9451672_10036.cpp:84: error: `strcmp' undeclared (first use this function)
0_0_9451672_10036.cpp:89: error: `printf' undeclared (first use this function)