c语言现代第2版 第一章

第一章

#include <stdio.h>

int main(void)
{
    printf("hello, world\n");

    return 0;
}

#include <stdio.h>

int main(void)
{
	printf("parkinson's law:\nwork expand so as to ");
	printf("fill the time \n");
	printf("available for its completion.\n");

	return 0;
}

#include <stdio.h>

int main(void)
{
    int volume;
    int height = 8, lenght = 12, width = 10;

    volume = height * lenght * width;

    printf("volume:%d\n", volume);
    printf("dimens: %dx%dx%d\n", lenght, width, height);
    printf("dimensional weight:%d\n", (volume + 165) / 166);

    return 0;

} 

#include <stdio.h>

int main(void)
{
     
    int height, lenght, width;
    
    printf("the sum is %d %d %d\n", lenght, width, height);

    return 0;
    
}

 

a 不合法
b 合法
c 合法
d 合法

不知道。

for if while 是
main printf 不是

14个记号

answer = (3 * q - p * q) / 3;

空

#include <stdio.h>

int main(void)
{

    printf("       *\n");
    printf("      *\n");
    printf("     *\n");
    printf("*   *\n");
    printf(" * *\n");
    printf("  * \n");

    return 0;
}

#include <stdio.h>

#define PI 3.14f

int main(void)
{
    float v;
    int r;

    r = 10;
    v = (4.0f / 3.0f) * PI * r * r * r;

    printf("the sum is %f\n", v);

    return 0;



}

#include <stdio.h>

int main(void)
{
    int num;
    float sum;

    printf("Enter a num:");
    scanf("%d", &num);

    sum = (1+0.05) * num;

    printf("with tax added: $%.2f\n", sum);

    return 0;
    
}

#include <stdio.h>

int main(void)
{
    int x, y;

    printf("Enter a num:");
    scanf("%d", &x);

    y = 3 * x * x * x * x * x + 2 * x * x * x * x - 5 * x * x * x - x * x + 7 * x - 6;

    printf("the sum is %d",  y);

    return 0;
}

#include <stdio.h>

int main(void)
{
    int x, y;
    
    printf("Enter a num:");
    scanf("%d", &x);

    y = ((((3 * x+2)*x-5)*x-1)*x+7)*x-6;

    printf("the sum is %d\n", y);
    return 0;


}

#include <stdio.h>

int main(void)
{
    int num, num20, num10, num5, num1;

    printf("Enter a num:");
    scanf("%d", &num);

    num20 = num / 20;
    num10 = (num - num20 * 20) / 10;
    num5 = (num - num20 * 20 - num10 * 10) / 10;
    num1 = num - num20 * 20 - num10 * 10 - num5 * 5;

    printf("$20 bills is %d:\n", num20);
    printf("$10 bills is %d\n", num10);
    printf("$5 bills is %d\n", num5);
    printf("$1 bills is %d\n", num1);

    return 0;

}

#include <stdio.h>

#define mon_rate (1+ rate * 0.01 / 12)
int main(void)
{
    float sum, rate, pay;
    float fir_remain, sec_remain, thr_remain;

    printf("Enter the sum:");
    scanf("%f", &sum);

    printf("Enter rate:");
    scanf("%f", &rate);

    printf("Enter pay:");
    scanf("%f", &pay);
    printf("\n\n");

    fir_remain = mon_rate * sum - pay;
    sec_remain = fir_remain * mon_rate - pay;
    thr_remain = sec_remain * mon_rate - pay;

    printf("the fir_remain is %.2f\n", fir_remain);
    printf("the sec_remain is %.2f\n", sec_remain);
    printf("the thr_remain is %.2f\n", thr_remain);

    return 0;
    


}