int main()
{
    /*
        多行注釋
        定義一個變量，并且初始化
    */
    int i = (int) (10.3 / 3);
    printf("i = %d\n", i);
    //單行注釋
    /*
        // 多行注釋中嵌套單行注釋，無意義
    */
    return 0；
}

#include <stdio.h>
int main()
{
    int a = 0;
    int b = 10;
    a = b = b + 1; // a=>11  b=>11
    printf("a = %d, b = %d\n", a, b);
    a += 1;
    a -= 2;
    a *= 3;
    a /= 4;
    // a => 7
    printf("a = %d\n", a);
    /*
        復合賦值與連續(xù)賦值相結合
    */
    a += b -= 1;
    printf("a = %d, b = %d\n", a, b);
    return 0;
}

int main()
{
    int a = 0;
    int b = 1;
    a = 2, b = 3, printf("a + b = %d\n", a + b);
    return 0;
}

#include <stdio.h>
int main()
{
    int a = 0;
    int b = 10;
    int c = 0;
    a = (b < 10) ? 1 : 2;
    printf("a = %d\n", a);
    (a < 5) ? (a = 5) : (a = 0);
    printf("a = %d\n", a);
    /*
    ((a == 5) ? a : b) = 10; // ERROR
    */
    a = b = c = 0;
    c = (a = 2, b = 3, a + b);
    printf("a = %d\n", a);
    printf("b = %d\n", b);
    printf("c = %d\n", c);
    c -= a;  // c = c - a;
    printf("c = %d\n", c);
    return 0;
}

#include <stdio.h>
int main()
{
    int a = 0;
    int c = 1;
    a = -c++;  // c -> 2
    printf("a = %d\n", a);
    a = +(++c); // +(++c); c -> 3
    printf("a = %d\n", a);
    a = -c--;  // c -> 2
    printf("a = %d\n", a);
    printf("c = %d\n", c);
    return 0;
}

c = 1;
goto LABEL;
c = 2;
LABEL:
    printf("c = %d\n",c);

#include <stdio.h>
int main()
{
    int a = 0;
    int c = 1;
    if( a + c > 0 )
    {
        printf("a = %d, c = %d\n", a, c);
        goto ELSE;
    }
    else
    {
        ELSE: printf("%d + %d = %d\n", a, c, a + c);
        goto FOR;
    }
    for(c=10; c>0; c--)
    {
        FOR:
        printf("c = %d\n", c);
    }
    return 0;
}