View Compilation Error

1010502_0_0_26680.cpp: In function `int main()':
1010502_0_0_26680.cpp:4: error: `scanf' undeclared (first use this function)
1010502_0_0_26680.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
1010502_0_0_26680.cpp:5: error: `printf' undeclared (first use this function)