foo.cc: In function 'int main()':
foo.cc:5:42: warning: unused variable 'i' [-Wunused-variable]
    5 |  int min,max,a[100][100],n=4,b[100][100],i,j,t;
      |                                          ^
foo.cc:5:44: warning: unused variable 'j' [-Wunused-variable]
    5 |  int min,max,a[100][100],n=4,b[100][100],i,j,t;
      |                                            ^
foo.cc:5:46: warning: variable 't' set but not used [-Wunused-but-set-variable]
    5 |  int min,max,a[100][100],n=4,b[100][100],i,j,t;
      |                                              ^

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