C语言程序设计实验指导 部分源代码(7)

}

int n,i;

double sum=0.0; printf(\输入n:\scanf(\for(i=0;i

printf(\输入%d个学生的学号、姓名和成绩:\scanf(\sum+=stu.score;

printf(\平均成绩:%.2f\\n\return 0;

#include//9-4 int main(){

struct complex{ int a,b;

}x,y,z;

printf(\输入a1, a2, b1, b2:\

scanf(\z.a=x.a*y.a-x.b*y.b; z.b=x.a*y.b+x.b*y.a;

printf(\×(%d+%di)=%d+%di\\n\ return 0; }

#include//9-5 int main(){ struct book{

char name[80]; double price; }abook,min,max; int n,i;

printf(\输入n:\scanf(\min.price=10000; max.price=-1;

for(i=0;i

printf(\输入第%d本书的名称和定价:\scanf(\if(min.price>abook.price) min=abook;

if(max.price

max=abook; }

printf(\价格最高的书: %s ,价格:%.1f\\n\

printf(\价格最低的书: %s ,价格:%.1f\\n\

return 0; }

#include//9-6 int main(){ }

struct addres{ char name[20];

int birthday; char phon[80];

}person[10],tmp; int n,i,j,index; printf(\输入n:\scanf(\for(i=0;i

printf(\输入第%d个人的姓名、生日、电话号码:\

scanf(\

}

for(i=0;i

for(j=1;jperson[index].birthday) index=j; tmp=person[n-i-1];

person[n-i-1]=person[index]; person[index]=tmp;

}

for(i=0;i

printf(\return 0;

#include//9-7 struct date{

int year,month,day; };

int day_of_year(struct date date){ int k,leap,d=date.day;

int

tab[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},{31,29,31,30,31,30,31,31,30,31,30,31}}; }

leap=(date.year%4==0&&date.year0!=0||date.year@0==0); for(k=0;k

int main(){ }

struct date date; printf(\输入日期:\

scanf(\

printf(\该日期是%d年第%d天\\n\return 0;

#include//9-8 struct time{ };

void chang_time(struct time* t,int n){ }

t->second=t->second+n; t->minit+=t->second/60; t->second=t->second`; t->hour+=t->minit/60; t->minit%=60; t->hour%=24;

int hour,minit,second;

int main(){ struct time t; }

int n;

printf(\输入时间:\

scanf(\printf(\输入秒:\scanf(\chang_time(&t,n);

printf(\新时间:%d:%d:%d\\n\return 0;

实验10

#include //10-2 #include

int is_sqr(int m){ int s=sqrt((double)m);

return s*s==m; }

int same_dig(int m){

int d[3],i,j; d[0]=m; d[1]=(m/10); d[2]=m/100;

for(i=0;i<3;i++)

}

for(j=i+1;j<3;j++)

if(d[i]==d[j]) return 1; return 0;

int fun(int number){ int i,c=0; }

int main(){ int number,i,count;

printf(\scanf(\count=fun(number);

printf(\return 0;

for(i=101;i<=number;i++) if(is_sqr(i)&&same_dig(i))

c++;

return c;

}

#include //10-3

#include int prime(int m){ int k,sqrtm=sqrt((double)m); for(k=2;k<=sqrtm;k++)

if(m%k==0) return 0;

return 1;

}

int main(){

int i,n,x,count=0; printf(\

scanf(\

printf(\for(i=0;i

if(prime(x))

count++;

printf(\return 0;

}

#include //10-4 double P(int n, double x){

if(n==0)

return 1.0; if(n==1) return x;

return ((2*n-1)*P(n-1,x)-(n-1)*P(n-2,x))/n;

}

int main(){ }

int n; double x;

printf(\scanf(\printf(\

scanf(\

printf(\return 0;

#include //10-5 int Ack(int m, int n){ if(m==0)

return n+1; if(n==0)

return Ack(m-1,1); return Ack(m-1,Ack(m,n-1)); }

int main(){

int m,n;

printf(\scanf(\

printf(\scanf(\

printf(\return 0;

}

#include //10-6 void dectobin(int n){ if(n<=1){

}

printf(\return;

dectobin(n/2); printf(\

}

int main(){ int n;