#include <stdio.h>

int main(){
    int x=1,y=2,z=3;
    float a1=x*y*z;
    
    printf("x = %d\n",x);
    printf("y = %d\n",y);    
    printf("z = %d\n",z);
    printf("x*y*z = %d*%d*%d = %d\n",x,y,z,x*y*z);
    printf("a1 = %f\n", a1);
    
    // (1) Is there any difference if the \n is removed in the format string?
    // (2) Guess the output before you actually ask the computer run the code.

    x=x+y+z;
    x=x+x;
    y=y*y;
    y=y*y;
    z=z+4;
    
    printf("x = %d, y = %d, z = %d\n",x,y,z);
    
    
    
    // The following two lines are just for keeping the black screen.
    int pause;    
    scanf("%d",&pause);
    
    // This means give out a integer 0 to the function main
    return 0;
}