foo.cc: In function 'int main()':
foo.cc:5:10: warning: variable 'j' set but not used [-Wunused-but-set-variable]
  int m,i,j,k=1,n;
          ^
foo.cc: At global scope:
foo.cc:24:1: error: expected unqualified-id before 'for'
 for(i=1;i<=n;i++)
 ^~~
foo.cc:24:9: error: 'i' does not name a type
 for(i=1;i<=n;i++)
         ^
foo.cc:24:14: error: 'i' does not name a type
 for(i=1;i<=n;i++)
              ^
foo.cc:25:9: error: 'j' does not name a type
 for(j=1;j<=n;j++)
         ^
foo.cc:25:14: error: 'j' does not name a type
 for(j=1;j<=n;j++)
              ^
foo.cc:27:1: error: 'cout' does not name a type; did you mean 'cosl'?
 cout<<endl;
 ^~~~
 cosl
foo.cc:30:1: error: expected unqualified-id before 'for'
 for(i=2;i<=n;i++)
 ^~~
foo.cc:30:9: error: 'i' does not name a type
 for(i=2;i<=n;i++)
         ^
foo.cc:30:14: error: 'i' does not name a type
 for(i=2;i<=n;i++)
              ^
foo.cc:35:1: error: 'k' does not name a type
 k=k+1;
 ^
foo.cc:36:1: error: expected declaration before '}' token
 }
 ^

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