View Compilation Error

0_0_21227787_32204.cpp: In function 'void init()':
0_0_21227787_32204.cpp:5:23: error: 'memset' was not declared in this scope
 memset(dp,0,sizeof(dp));
                       ^
0_0_21227787_32204.cpp: In function 'int main()':
0_0_21227787_32204.cpp:28:14: error: 'scanf' was not declared in this scope
 scanf("%d",&T);
              ^
0_0_21227787_32204.cpp:32:20: error: 'printf' was not declared in this scope
 printf("%d\n",dp[n]);
                    ^