谭浩强第四版C语言第四章课后习题答案

拼搏现实的明天。 2022-12-08 15:56 218阅读 0赞

谭浩强第四版C语言第四章课后习题答案

#include <stdio.h>
    
    int main()
    {
    	/*4-4
    	int a,b,c;
    	printf("请输入三个整数：\n");
    	scanf("%d%d%d",&a,&b,&c);
    	printf("a=%d,b=%d,c=%d\n",a,b,c);
    	int max = a;
    	if(max < b)
    		 max =b;
    	if(max < c)
    		max = c;
    	printf("max=%d\n",max);
    	return 0;
    	*/
    
    	/*4-8
    	float score;
    	char grade;
    	scanf("%f",&score);
    	if(score > 100 || score < 0)
    	{
    		printf("请重新输入成绩\n");
    		scanf("%f",&score);
    	}
    	int s = score/10;
    	switch(s)
    	{
    	case 10:
    	case 9: 
    		grade = 'A';
    		break;
    	case 8:
    		grade = 'B';
    		break;
    	case 7:
    		grade = 'C';
    		break;
    	case 6:
    		grade = 'D';
    		break;
    	case 5:
    	case 4:
    	case 3:
    	case 2:
    	case 1:
    	case 0:
    		grade = 'E';
    		break;
    	}
    	printf("你的成绩是%.2f,等级是%c\n",score,grade);
    	return 0;
    	*/
    
    	
    	/*4-9
    	int num,tth,th,hun,ten,ge,place;
    	printf("请输入一个正整数：");
    	scanf("%d",&num);
    	if(num < 0 || num > 99999)
    	{
    		printf("请重新输入一个正整数：");
    		scanf("%d",&num);
    	}
    	if(num > 9999)
    		place = 5;
    	else if(num > 999)
    		place = 4;
    	else if(num > 99)
    		place = 3;
    	else if(num > 9)
    		place = 2;
    	else 
    		place = 1;
    	tth = num/10000;
    	th = (num - tth*10000)/1000;
    	hun =( num - tth*10000-th*1000)/100;
    	ten = ( num - tth*10000-th*1000-hun*100)/10;
    	ge = num - tth*10000-th*1000-hun*100-ten*10;
    	switch(place)
    	{
    	case 1:
    		printf("这是1位数\n");
    		printf("%d\n",num);
    		break;
    	case 2 :
    		printf("这是2位数\n");
    		printf("%d%d\n",ge,ten);
    		break;
    	case 3 :
    		printf("这是3位数\n");
    		printf("%d%d%d\n",ge,ten,hun);
    		break;
    	case 4 :
    		printf("这是4位数\n");
    		printf("%d%d%d%d\n",ge,ten,hun,th);
    		break;
    	case 5 :
    		printf("这是5位数\n");
    		printf("%d%d%d%d%d\n",ge,ten,hun,th,tth);
    		break;
    	}
    	*/
    
    	/*4-11
    int a[4],i,j,s=0;
    	printf("请输入四个整数：");
    	for (i = 0;i<4;i++)
    	{
    		scanf("%d",&a[i]);
    	}
    	for (i=0;i<3;i++)  //4个数只需要左右比较三次
    	{
    		for(j=i+1;j<4;j++)
    		{
    			if( a[i] > a[j])
    			{
    				s=a[i];
    				a[i]=a[j];
    				a[j]=s;
    			}
    		}
    	}
    	for (i=0;i<4;i++)
    	{
    		printf("%d\n",a[i]);
    	}
    	return 0;
    */
    }