foo.cc: In function 'int main()':
foo.cc:32:7: error: expected '(' before '{' token
  while{
       ^
foo.cc:32:7: error: expected primary-expression before '{' token
foo.cc:32:7: error: expected ')' before '{' token
foo.cc:34:4: error: 'mycope' was not declared in this scope
    mycope(t,s2,i,L);
    ^~~~~~
foo.cc:34:4: note: suggested alternative: 'mycopy'
    mycope(t,s2,i,L);
    ^~~~~~
    mycopy
foo.cc:24:10: warning: unused variable 'n1' [-Wunused-variable]
  int num,n1,n2,L,k,n;
          ^~
foo.cc:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
   ~~~~~^~~~~~~~~

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