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  1. #include <stdio.h>
  2.  
  3. main(){
  4. double count=0,sum=0,data;
  5. while(scanf("%lf",&data)!=EOF){
  6. sum+=data;
  7. count++;
  8. }
  9. printf("%f",sum/count);
  10. }
  11.  
Success #stdin #stdout 0.01s 5320KB
stdin
98 89 87 99 96
stdout
93.800000