What mistake this programme

Question

#include <stdio.h>

int main() {
int a,b,sum;
printf("Enter two integer number:");
scanf("%d%d",&a,&b);
sum==(a+b);
printf("%d is the summation",sum);
return 0;
}

Answer 1

Not is sum== (a+b).
You are trying to compare the values, the correct thing is that you should assign the values ​​to the sum variable.
The correct is :
sum= a +b ;

Answer 2

#include <stdio.h>

int main() {
int a,b,sum;
printf("Enter two integer number:");
scanf("%d%d",&a,&b);
sum=a+b;
printf("%d is the summation",sum);
return 0;
}