Operators in C | Relational operators

Example of ==  and  !=

#include<stdio.h>
int main()
{
    int a=10,b=20,c;
    c=a==b;
    printf("a = %d\n",a);
    printf("b = %d\n",b);
    printf("%d == %d = %d\n",a,b,c);
    return 0;
}

/* Output */
a = 10
b = 20
10 == 20 = 0

#include<stdio.h>
int main()
{
    int a=10,b=20,c;
    c=a!=b;
    printf("a = %d\n",a);
    printf("b = %d\n",b);
    printf("%d != %d = %d\n",a,b,c);
    return 0;
}

/* Output */
a = 10
b = 20
10 != 20 = 1

Solve the following:
1.

#include<stdio.h>
int main()
{
    int a,b,c;
    /* 1 */
    a=10;
    b=20;
    c=a=b;
    printf("c = %d\n",c);
    /* 2 */
    a=10;
    b=20;
    c=b=a;
    printf("c = %d\n",c);
    return 0;
}

/* Output */
c = 20
c = 10