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View Compilation Error

0_0_32773729_5325.cpp: In function 'int main()':
0_0_32773729_5325.cpp:22:21: error: 'scanf' was not declared in this scope
  while(scanf("%d",&n)!=EOF)
                     ^
0_0_32773729_5325.cpp:22:24: error: 'EOF' was not declared in this scope
  while(scanf("%d",&n)!=EOF)
                        ^
0_0_32773729_5325.cpp:31:14: error: 'printf' was not declared in this scope
    printf(" ");
              ^
0_0_32773729_5325.cpp:33:23: error: 'printf' was not declared in this scope
    printf("%d",a[i][j]);
                       ^
0_0_32773729_5325.cpp:35:15: error: 'putchar' was not declared in this scope
   putchar('\n');
               ^
0_0_32773729_5325.cpp:37:15: error: 'putchar' was not declared in this scope
   putchar('\n');
               ^


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