I don't understand why I get wrong answer:
#include <stdio.h>
#include <stdlib.h>

main()
{
  float a,b;
  printf("Enter a:");
  scanf("%f",&a);
  printf("Enter b:");
  scanf("%f",&b);
  printf("a+b=%3.2f",a+b);
  system("PAUSE");
  return 0;
}

Edited by author 10.10.2008 23:04

Your program outputs this instead of just "6" for sample:

Vvedite a:Vvedite b:a+b=6.00

See examples of correct solutions in the FAQ

This problem is solved to complicate.In C++ the correct answer is:
#include<iostream.h>
long a,b;
int main()
{
cin>>a>>b;
cout<<a+b;
return 0
}