foo.cc: In function 'int main()':
foo.cc:24:21: error: too few arguments to function 'int JS(int (*)[100], int, int, int)'
    b[i][j]=JS(a, i,j);  // !!
                     ^
foo.cc:4:5: note: declared here
 int JS(int a[100][100], int n, int i,int j)
     ^~
foo.cc:18:6: warning: unused variable 'rowsum' [-Wunused-variable]
  int rowsum[100]={0}, colsum[100]={0};
      ^~~~~~
foo.cc:18:23: warning: unused variable 'colsum' [-Wunused-variable]
  int rowsum[100]={0}, colsum[100]={0};
                       ^~~~~~

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