foo.cc: In function 'int main()':
foo.cc:23:46: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
   printf("%3d %3d %3d\n",i[cnt],j[cnt],k[cnt]);
                          ~~~~~~              ^
foo.cc:23:46: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat=]
foo.cc:23:46: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long int' [-Wformat=]
foo.cc:7:17: warning: unused variable 'sum' [-Wunused-variable]
  long int a,b,c,sum,cnt=0;
                 ^~~

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