foo.cpp:6:5: error: stray '\243' in program
     scanf("%d%d",&m,&n)；
     ^
foo.cpp:6:5: error: stray '\273' in program
foo.cpp: In function 'int main()':
foo.cpp:7:9: error: expected ';' before 'double'
         double sum=m;
         ^
foo.cpp:9:13: error: 'sum' was not declared in this scope
             sum-=qpow(double(i)/m, n);
             ^
foo.cpp:11:26: error: 'sum' was not declared in this scope
         printf("%.4f\n", sum);
                          ^