大学经典C语言编程试题[共51页].doc

1.输入两个正整数, m 和 n,求其最大条约数和最小公倍数includevoid main(){int hcf(int,int); /* 函数声明 */int lcd(int,int,int); /* 函数声明 */int u,v,h,l;printf("Please ｉｎｐｕｔ two numbers:\n");scanf("%d,%d",&u,&v);h=hcf(u,v);printf("H.C.F=%d\n",h);l=lcd(u,v,h);printf("L.C.D=%d\n",l);}int hcf(int u,int v){int t,r;if(v>u){t=u;u=v;v=t;}while((r=u%v)!=0){u=v;v=r;}return(v);}int lcd(int u,int v,int h){return(u*v/h);}2.输入一行字符,分别统计出其中字母、空格、数字和其他字符的个数includeint letter,digit,space,others;void main(){void count(char[]);char text[80];printf("Please ｉｎｐｕｔ string:\n");gets(text);printf("string:\n");puts(text);letter=0;digit=0;space=0;others=0;count(text);printf("letter:%d,digit:%d,space:%d,others:%d\n",letter,digit,space,others);}void count(char str[]){int i;for(i=0;str[i]!='\0';i++)if((str[i]>='a'&&str[i]<='z')||(str[i]>='A'&&str[i]<='Z'))letter++;else if(str[i]>='0'&&str[i]<='9')digit++;else if(str[i]==32)space++;elseothers++;}3.输入一个正整数求出它是几位数；输出原数和位数。

includeint digit;void main(){void count(char[]);char text[80];printf("Please ｉｎｐｕｔ numbers:\n");gets(text);printf("Numbers:\n");puts(text);digit=0;count(text);printf("digit:%d\n",digit);}void count(char str[]){int i;for(i=0;str[i]!='\0';i++)if(str[i]>='0'&&str[i]<='9')digit++;}4.输入一个正整数,输出原数并逆序打印出各位数字includevoid invertLongInt(long);void main(){unsigned long iNumber;printf("Please ｉｎｐｕｔ a number:\n");scanf("%ld",&iNumber);printf("The ｉｎｐｕｔ number is:%ld\n",iNumber);printf("The inverse number is:");invertLongInt(iNumber);}void invertLongInt(long x){if(x>=0&&x<=9)printf("%d\n",x);else{printf("%d",x%10);invertLongInt(x/10);}}5.从键盘上输入若干学生的一门课成绩,统计并输出最高成绩和最低成绩及相应的序号,当输入负数时结束输入。

6.从键盘上输入若干学生的一门课成绩,计算出平均分,当输入负数时结束输入将结果输出7.求 1!+2!+3!+ ,, +20!,将结果输出includevoid main(){float s=0,t=1;int n;for(n=1;n<=20;n++){t=t*n;s=s+t;}printf("1!+2!+3!+ ⋯ ⋯ +20!\=n%",se);}8.打印以下图案： ****************#includevoid main(){int i,j;printf("The picture is:\n");static char picture[4][7]={{' ',' ',' ','*'},{' ',' ','*','*','*'},{' ',' *','*','*','*','*'},{'*','*','*','*','*','*','*'}};for(i=0;i<=3;i++){for(j=0;j<=6;j++)printf("%c",picture[i][j]);printf("\n");}}9.打印以下图案：**********#includevoid main(){int i,j;printf("The picture is:\n");char picture[4][4]={{'*'},{'*','*'},{' *','*','*'},{'*','*','*','*'}};for(i=0;i<=3;i++){for(j=0;j<=3;j++)printf("%c",picture[i][j]);printf("\n");}}10.求下列试子的值： 1-1/2+1/3-1/4+ ,, +1/99-1/100 ,将结果输出。

includevoid main(){float sum=1.0,t,s=1;int i;for(i=1;i<=100;i++){t=s/i;sum=sum+t;s=-s;}printf("1-1/2+1/3- 1/4+ ⋯ ⋯ +1/99-1/100=%5.4f\n",sum);}11.打印出 100～999 之间的所有水仙花数includevoid main(){int i,j,k,n;printf("100 ～999 之间的所有水仙花数 are:\n");for(n=100;n<1000;n++){i=n/100;j=n/10-i*10;k=n%10;if(n==i*i*i+j*j*j+k*k*k)printf("%d ",n);}printf("\n");}12.求 Sn=a+aa+aaa+, +aa, a 之值, n,a 由键盘输入includevoid main(){int a,n,i=1,sn=0,tn=0;printf("a,n=:");scanf("%d,%d",&a,&n);while(i<=n){tn=tn+a;sn=sn+tn;a=a*10;++i;}printf("a+aa+aaa+ ⋯ +aa⋯ a\ n="%, sdn ) ;}13.打印以下图案：****************************#includevoid main(){char a[7]={'*','*','*','*','*','*','*'};int i,j,k;char space=' ';printf("The picture is:");for(i=0;i<4;i++){printf("\n");printf(" ");for(j=1;j<=i;j++)printf("%c",space);for(k=0;k<7;k++)printf("%c",a[k]);}printf("\n");}14.打印以下图案：11211232115. 打印以下图案：12321121116.编写一个统计学生成绩程序,完成以下效用：输入 4 个学生的 2 门课成绩；求出全班的总平均分,将结果输出。

include#define N 4struct student{char num[3];char name[4];float score[2];float avr;}stu[N];void main(){int i,j;float sum,average;for(i=0;ivoid main(){char a[5]={'*','*','*','*','*'};int i,j,k;char space=' ';printf("The picture is:");for(i=0;i<5;i++){printf("\n");printf(" ");for(j=1;j<=i;j++)printf("%c",space);for(k=0;k<5;k++)printf("%c",a[k]);}printf("\n");}18.给出年、月、日,计算该日是该年的第几天。

includevoid main(){int sum_day(int,int);int leap(int 。