/in/foo.c: In function 'merge':
/in/foo.c:7:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while(i<=mid&&j<=high)
     ^~~~~
/in/foo.c:20:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
  while(i<=mid){
  ^~~~~
/in/foo.c: At top level:
/in/foo.c:47:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main(){
      ^~~~