foo.cc: In function 'int Mul2(int*, int, int*, int, int*)':
foo.cc:21:6: warning: unused variable 'jw' [-Wunused-variable]
21 | int jw=0,n=0,i;
| ^~
foo.cc: In function 'int main()':
foo.cc:50:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
50 | scanf("%d %d",&n1,&x1);
| ~~~~~^~~~~~~~~~~~~~~~~
foo.cc:51:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
51 | scanf("%d %d",&n2,&x2);
| ~~~~~^~~~~~~~~~~~~~~~~
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