Question1

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What does the following program print?

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#include <stdio.h>

int main() {
    int x = 2, y, z;
	
    x *= (y = z = 5); printf("%d\n", x);
	
    z = 3;
    x == (y = z);     printf("%d\n", x);
    x = (y == z);     printf("%d\n", x);
    x = (y & z);      printf("%d\n", x);
    x = (y && z);     printf("%d\n", x);
    y = 4;
    x = (y | z);      printf("%d\n", x);
    x = (y || z);     printf("%d\n", x);
	
    getchar();
	
    return 0;
}
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分析：
x *= (y = z = 5) => z = 5, y = 5, x = x * y = 10;

z = 3;
x == (y = z);    => z = 3, y = 3, x = 10;
x = (y == z);    => z = 3, y = 3, x = 1;
x = (y & z);     => z = 3, y = 3, x = 3;
x = (y && z);    => z = 3, y = 3, x = 1;
y = 4;
x = (y | z);     => z = 3, y = 4, x = 7;
x = (y || z);    => z = 3, y = 4, x = 1;