main()
{
    printf("%d,%d\n",3+2,3-2);
    printf("%d,%d,%f\n",3*2,3/2,3.0/2);
    printf("%d\n",3%2); 

}

main()
{

    int i=3,j;
    j=i++; 
    printf("i=%d,j=%d\n",i++,j);
    j=++i; 
    printf("i=%d,j=%d\n",++i,j); 
    j=--i; 
    printf("i=%d,j=%d\n",i--,j);    
    j=i--;    
    printf("i=%d,j=%d\n",--i,j);     

}

main()
{

    int a; 
    a=34.567; 
    printf("a=%d\n",a);  

}

main()
{

    int a=1,b=2,c=3,x,y; 
    y=(x=a+b,b+c,x+c); 
    printf("x=%d,y=%d\n",x,y);   

}