View Compilation Error

0_0_38784364_32259.cpp: In function 'int main()':
0_0_38784364_32259.cpp:63:15: error: redeclaration of 'int sum'
   63 |         int m,sum=0;
      |               ^~~
0_0_38784364_32259.cpp:47:19: note: 'int sum' previously declared here
   47 |     int a,b,i,j,c,sum;
      |                   ^~~