Thread: sum problem

Code:

#include <stdio.h>
main()
{
int a,b,c;
c=a+b;
printf("give first number:");
scanf("%d",&a);
printf("give second number:");
scanf("%d",&b);
printf("the result is:");
printf("%d",c);
}

but when i give for first number 4 and for second number 7 my result is not 11.
the problem is propably the last printf.what is the correct syntax for valid result??