View Compilation Error

0_0_16093161_12486.cpp: In function 'int main()':
0_0_16093161_12486.cpp:3:25: error: 'scanf' was not declared in this scope
     while (scanf("%d",&t)!=EOF) {
                         ^
0_0_16093161_12486.cpp:3:28: error: 'EOF' was not declared in this scope
     while (scanf("%d",&t)!=EOF) {
                            ^
0_0_16093161_12486.cpp:8:23: error: 'printf' was not declared in this scope
             printf("0");
                       ^