View Compilation Error

762286_0_0_26059.cpp: In function `int main()':
762286_0_0_26059.cpp:6: error: `scanf' undeclared (first use this function)
762286_0_0_26059.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
762286_0_0_26059.cpp:9: error: `num' undeclared (first use this function)
762286_0_0_26059.cpp:11: error: `count' undeclared (first use this function)
762286_0_0_26059.cpp:15: error: `find' undeclared (first use this function)
762286_0_0_26059.cpp:27: error: `balloon' undeclared (first use this function)
762286_0_0_26059.cpp:27: error: `printf' undeclared (first use this function)