C语言程序设计题大全.doc

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1、01.输入两个正整数，m和n，求其最大公约数和最小公倍数。＃includevoidmain(){inthcf(int,int);intlcd(int,int,int);intu,v,h,l;printf("Pleaseinputtwonumbers:");scanf("%d,%d",&u,&v);h=hcf(u,v);printf("H.C.F=%d",h);l=lcd(u,v,h);printf("L.C.D=%d",l);}inthcf(intu,intv){intt,r;if(v>u){t=u;u=v;v=t;}while((r=

2、u%v)!=0){u=v;v=r;}return(v);}intlcd(intu,intv,inth){return(u*v/h);}02.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。＃includeintletter,digit,space,others;voidmain(){voidcount(char[]);chartext[80];printf("Pleaseinputstring:");gets(text);printf("string:");puts(text);letter=0;digit=0;space=0

3、;others=0;count(text);printf("letter:%d,digit:%d,space:%d,others:%d",letter,digit,space,others);}voidcount(charstr[]){inti;for(i=0;str[i]!='';i++)if((str[i]>='a'&&str[i]<='z')

4、

5、(str[i]>='A'&&str[i]<='Z'))letter++;elseif(str[i]>='0'&&str[i]<='9')digit++;elseif(str[i]==32)space++;els

6、eothers++;}03.输入一个正整数求出它是几位数；输出原数和位数。＃includeintdigit;voidmain(){voidcount(char[]);chartext[80];printf("Pleaseinputnumbers:");gets(text);printf("Numbers:");puts(text);digit=0;count(text);printf("digit:%d",digit);}voidcount(charstr[]){inti;for(i=0;str[i]!='';i++)if(str[

7、i]>='0'&&str[i]<='9')digit++;}04.输入一个正整数，输出原数并逆序打印出各位数字。＃includevoidinvertLongInt(long);voidmain(){unsignedlongiNumber;printf("Pleaseinputanumber:");scanf("%ld",&iNumber);printf("Theinputnumberis:%ld",iNumber);printf("Theinversenumberis:");invertLongInt(iNumber);}voidinver

8、tLongInt(longx){if(x>=0&&x<=9)printf("%d",x);else{printf("%d",x%10);invertLongInt(x/10);}}05.题目：输出三个数，按大小排列#includemain(){inta,b,c,t;printf("pleaseenter:");scanf("%d%d%d",&a,&b,&c);if(a>b){t=a;a=b;b=t;}/*交换a,b的值*/if(a>c){t=c;c=a;a=t;}/*交换a,c的值*/if(b>c){t=b;b=c;c=t;}/*交换c,b的值

9、*/printf("smalltobig:%d%d%d",a,b,c);06.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。07.求1!+2!+3!+……+20!，将结果输出。＃includevoidmain(){floats=0,t=1;intn;for(n=1;n<=20;n++){t=t*n;s=s+t;}printf("1!+2!+3!+……+20!=%e",s);}08.打印以下图案：****************＃includevoidmain(){inti,j,k;p