View Compilation Error

0_0_15996613_26381.cpp: In function 'int main()':
0_0_15996613_26381.cpp:3:29: error: 'scanf' was not declared in this scope
    while((scanf("%d%d",&n,&m))!=EOF)
                             ^
0_0_15996613_26381.cpp:3:33: error: 'EOF' was not declared in this scope
    while((scanf("%d%d",&n,&m))!=EOF)
                                 ^
0_0_15996613_26381.cpp:15:34: error: 'printf' was not declared in this scope
                printf("%d",sum1/m);
                                  ^
0_0_15996613_26381.cpp:24:35: error: 'printf' was not declared in this scope
        printf(" %d\n",sum1/(n-d*m));
                                   ^
0_0_15996613_26381.cpp:25:24: error: 'printf' was not declared in this scope
        else printf("\n");
                        ^