foo.cc: In function 'int main()':
foo.cc:125:2: error: 'i' was not declared in this scope
  125 |  i=j=t=1;
      |  ^
foo.cc:125:4: error: 'j' was not declared in this scope
  125 |  i=j=t=1;
      |    ^
foo.cc:125:6: error: 't' was not declared in this scope
  125 |  i=j=t=1;
      |      ^
foo.cc:126:11: error: 'n' was not declared in this scope
  126 |  while(t<=n*n)
      |           ^
foo.cc:157:13: error: 'n' was not declared in this scope
  157 |  for(i=1;i<=n;i++)
      |             ^

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