急求 3道c语言编程题

2025-04-09 14:55:15
推荐回答(1个)
回答1:

第一道:(太晚了,困了,没时间写注释,不好意思)
#include
#include
#include

int compare(int *a,int n)
{
int temp;
if(a[0]>a[1])
temp=a[0];
else
temp=a[1];
if(temp temp=a[2];
return temp;
}//compare

void main()
{
int a[3];
char str[3][10];
char *p;
int i,j,count;
printf("Please input the data.\n");
for( i=0;i<3;i++)
{
gets(str[i]);
p=str[i];
while(*p!='\0')
{
if(*p>='0'&&*p<='9')
p++;
else
{
printf("Data error!Please try again!\n");
i--;
break;
}//else
}//while

}//for
for( i=0;i<3;i++)
{
puts(str[i]);
count=0;
for(j=0;j {
count*=10;
count=count+(int)str[i][j]-48; //减去48是把字符型的ASCII码转换成本身代表的整数
}//for
a[i]=count;
}//for
printf("The max number is:%d.\n",compare(a,3));
}//main
第二道条件太少,不知道楼主到底想怎样的分寝室。
第三道:
#include

void main()
{
int i,j,count,m=0;
for(i=2;i<=1000;i++)//1不是素数
{
count=0;
for(j=2;j<=i/2;j++)
{
if(i%j==0)
{ count++;
break;
}
}//for
if(count==0)
{ printf("%d\t",i);
m++;
}//if
if(m==5)
{
printf("\n");
m=0;
}//if
}//for
}//main

补充:(时间匆忙,没时间编译。)
#include
void main()
{
int person;
printf("Please input the number of person!");
scanf("%d",&person);
if(person%6==0)
printf("The number of dormitory is %d",person/6);
else
printf("The number of dormitory is %d",person/6+1);
}//main

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