View Compilation Error

0_0_21596201_18122.cpp: In function 'int main()':
0_0_21596201_18122.cpp:2:17: error: 'T' was not declared in this scope
     scanf("%d",&T);
                 ^
0_0_21596201_18122.cpp:2:18: error: 'scanf' was not declared in this scope
     scanf("%d",&T);
                  ^
0_0_21596201_18122.cpp:4:21: error: 'n' was not declared in this scope
         scanf("%d",&n);
                     ^
0_0_21596201_18122.cpp:5:16: error: 'in' was not declared in this scope
         memset(in, 0 , sizeof(in));
                ^
0_0_21596201_18122.cpp:5:34: error: 'memset' was not declared in this scope
         memset(in, 0 , sizeof(in));
                                  ^
0_0_21596201_18122.cpp:6:16: error: 'out' was not declared in this scope
         memset(out, 0, sizeof(out));
                ^
0_0_21596201_18122.cpp:8:24: error: 'tmp' was not declared in this scope
             scanf("%s",tmp + 1);
                        ^
0_0_21596201_18122.cpp:29:31: error: 'printf' was not declared in this scope
         printf("Case #%d: ",ca);
                               ^
0_0_21596201_18122.cpp:31:23: error: 'puts' was not declared in this scope
         else puts("No");
                       ^