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1:C语言由函数所构成。所有的C程序都有且有一个main()函数。单词的组合形成了语言有意义的的语法单位。2：在程序中，适当的添加空行和空格，使程序清楚易读。赋值运算符为=。赋值运算符的左边必须为一个变量。C语言是区分字母的大小写的。==是关系运算符，用于比较两个操作数是否相等。输入参数的形式为&x。不要在for语句中随便加封号。3:采用多层缩进的书写格式，使程序层次分明。swith语句中case后面出现的应该是一个常量表达式。4：for语句和while语句都能实现循环，但是若给出了循环次数的话，一般使用for语句。5：return语句只能返回一个值。在不返回结果的函数定义中，void 阅读全文
posted @ 2013-10-06 21:14
吕鼎鼎19950427
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#includeint main(void){ int i,k; char str1[80],str2[80]; long number; printf("Enter a string:"); i=0; while((str1[i]=getchar())!='\n') i++; str1[i]='\0'; k=0; for(i=0;str1[i]!='\0';i++) if (str1[i]>='0'&&str1[i]='a'&&str1[i]='A 阅读全文
posted @ 2013-10-06 17:18
吕鼎鼎19950427
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#includeint main(void){ int count,i; char str[80]; printf("Enter a string:"); i=0; while((str[i]=getchar())!='\n') i++; str[i]='\0'; count=0; for(i=0;str[i]!='\0';i++) if(str[i]='0') count++; printf("count=%d\n",count); return 0;} 阅读全文
posted @ 2013-10-06 16:35
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#includeint main(void){ int i,number; char str[10]; printf("Enter a string:"); i=0; while((str[i]=getchar())!='\n') i++; str[i]='\0'; number=0; for(i=0;str[i]!='\0';i++) if(str[i]>='0'&& str[i]<='9') number=number*10+str[i]-'0'; 阅读全文
posted @ 2013-10-06 16:25
吕鼎鼎19950427
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#includeint main(void){ int i,n,m; char s[10]; printf("Enter a string:"); i=0; while((s[i]=getchar())!='\n'); i++; s[i]='\n'; for(n=0,m=i-1;n=m) printf("It is a plalindrome\n"); return 0;} 阅读全文
posted @ 2013-10-06 16:12
吕鼎鼎19950427
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#includeint main(void){ int i,j,n,temp; int a[6][6]; printf("Enter n:"); scanf("%d",&n); for(i=0;i<n;i++) for(j=0;j<n;j++) a[i][j]=i*n+j+1; for(i=0;i<n;i++) for(j=0;j<n;j++) if(i<=j){ temp=a[i][j]; ... 阅读全文
posted @ 2013-10-06 16:03
吕鼎鼎19950427
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#includeint main(void){ int i,j; int a[3][2]; for(i=0;i<3;i++) for(j=0;j<2;j++) a[i][j]=i+j; for(i=0;i<3;i++){ for(j=0;j<2;j++) printf("%4d",a[i][j]); } return 0;} 阅读全文
posted @ 2013-10-06 15:44
吕鼎鼎19950427
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#includeint main(void){ int col,i,j,row; int a[3][2]; printf("Enter 6 integers:\n"); for(i=0;ia[row][col]){ row=i; col=j; } printf("max=a[%d][%d]=%d\n",row,col,a[row][col]); return 0;} 阅读全文
posted @ 2013-10-06 15:40
吕鼎鼎19950427
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#includeint main(void){ int a[10]={1,2,3,4,5,6,7,8,9,10}; int low,high,mid,n=10,x; printf("Enter x:"); scanf("%d",&x); low=0;high=n-1; while(low<=high){ mid=(low+high)/2; if(x==a[mid]) break; else if(x<a[mid]) high=mid-1; else ... 阅读全文
posted @ 2013-10-06 15:33
吕鼎鼎19950427
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#includeint main(void){ int i,index,k,n,temp; int a[10]; printf("Enter n:"); scanf("%d",&n); printf("Enter %d integers:",n); for(i=0;i<n;i++) scanf("%d",&a[i]); for(k=0;k<n-1;k++){ index=k; for(i=k+1;i<n;i++) if(a[i]<a[index]) index =i; ... 阅读全文
posted @ 2013-10-06 15:25
吕鼎鼎19950427
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posted @ 2013-10-06 15:16
吕鼎鼎19950427
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#includeint main(void){ int i,flag,x; int a[5]; printf("Enter 5 integers:"); for(i=0;i<5;i++) scanf("%d",&a[i]); printf("Enter x:"); scanf("%d",&x); flag=0; for(i=0;i<5;i++) if(a[i]==x){ printf("Index is %d\n",i); flag=1; bre... 阅读全文
posted @ 2013-10-06 15:10
吕鼎鼎19950427
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#includeint main(void){ int i; int fib[10]={1,1}; for(i=2;i<10;i++) fib[i]=fib[i-1]+fib[i-2]; for(i=0;i<10;i++){ printf("%6d",fib[i]); if((i+1)%5==0) printf("\n"); } return 0;} 阅读全文
posted @ 2013-10-06 15:03
吕鼎鼎19950427
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#includeint main(void){ int count[9]; int i,response; for(i=1;i8) printf("this is a bad response:%d\n",response); else count[response]++; } printf("result:\n"); for(i=1;i<=8;i++) printf("%4d%4d\n",i,count[i]); return 0;} 阅读全文
posted @ 2013-10-06 13:59
吕鼎鼎19950427
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#includeint main(void){ char ch; printf("input character:"); ch=getchar(); while(ch!='\n'){ if(ch>='A'&&ch='a'&&ch<='z') ch=ch-'a'+'A'; putchar(ch); ch=getchar(); } return 0;} 阅读全文
posted @ 2013-10-06 13:52
吕鼎鼎19950427
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posted @ 2013-10-06 13:39
吕鼎鼎19950427
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#includeint main(void){ char ch='w'; int a=2,b=3,c=1,d,x=10; printf("%d",a>b==c); printf("%d",d=a>b); printf("%d",ch>'a'+1); printf("%d",d=a+b>c); printf("%d",b-1==a!=c); printf("%d",3<=x<=5); return 0;} 阅读全文
posted @ 2013-10-06 13:31
吕鼎鼎19950427
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#includeint main(void){ int i; char ch_lower,ch_upper; for(i=1;i='a'&&ch_lower%c->%d\n",ch_lower,ch_upper,ch_upper%10); } return 0;} 阅读全文
posted @ 2013-10-06 13:27
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posted @ 2013-10-06 13:21
吕鼎鼎19950427
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#includefloat cash;int main(void){ int choice; float value; void income(float number),expend(float number); cash=0; printf("Enter operate choice(0--end,1--income,2==expend):"); scanf("%d",&choice); while(choice!=0){ if(choice==1||choice==2){ printf("Enter cash ... 阅读全文
posted @ 2013-10-06 13:02
吕鼎鼎19950427
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#includeint x;int f();int main(void){ int a=1; x=a; a=f(); { int b=2; b=a+b; x=x+b; } printf("%d%d",a,x); return 0;}int f(){ int x=4; return x;} 阅读全文
posted @ 2013-10-06 12:45
吕鼎鼎19950427
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#includefloat result_real,result_imag;int main(void){ float imag1,imag2,real1,real2; void complex_prod(float real1,float imag1,float real2,float imag2); void complex_add(float real1,float imag1,float real2,float imag2); printf("Enter 1st complex number(real ang imaginary):"); scanf("% 阅读全文
posted @ 2013-10-06 12:43
吕鼎鼎19950427
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posted @ 2013-10-06 12:14
吕鼎鼎19950427
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#include#includeint main(void){ int count,m; int prime(int m); count=0; for(m=2;m<=100;m++){ if(prime(m)!=0){ printf("%6d",m); count++; if(count%10==0) printf("\n"); } } printf("\n");}int prime(int m){ int i,n; if(m==1)return 0;... 阅读全文
posted @ 2013-10-06 11:40
吕鼎鼎19950427
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#include#includeint main(void){ double e,pi; double funpi(double e); printf("Enter e:"); scanf("%lf",&e); pi=funpi(e); printf("pi=%f\n",pi); return 0;}double funpi(double e){ int denominator,flag; double item,sum; flag=1; denominator=1; item=1.0; sum=0; whil... 阅读全文
posted @ 2013-10-06 11:34
吕鼎鼎19950427
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#includeint main(void){ double height,radius,volume; double cylinder(double r,double h); printf("Enter tadius and height:"); scanf("%lf%lf",&radius,&height); volume=cylinder(radius,height); printf("Vplume=%.3f\n",volume); return 0;} double cylinder(double r,doub 阅读全文
posted @ 2013-10-06 11:15
吕鼎鼎19950427
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#includeint main(void){ int child,women,men; for(men=0;men<=15;men++) for(women=0;women<=22;women++){ child=45-men-women; if(men*3+women*2+child*0.5==45) printf("men=%d,women=%d,child=%d\n",men,women,child); } return 0;} 阅读全文
posted @ 2013-10-06 11:04
吕鼎鼎19950427
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#includeint main(void){ int child,men,women; for(men=0;men<=45;men++) for(women=0;women<=45;women++) for(child=0;child<=45;child++) if(men+women+child==45&&men*3+women*2+child*0.5==45) printf("men=%d,women=%d,child=%d\n",men,women,child); ... 阅读全文
posted @ 2013-10-06 10:58
吕鼎鼎19950427
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#includeint main(void){ int i,x1,x2,x; x1=1; x2=1; printf("%6d%6d",x1,x2); for(i=1;i<=8;i++){ x=x1+x2; printf("%6d",x); x1=x2; x2=x; } printf("\n"); return 0;} 阅读全文
posted @ 2013-10-06 10:49
吕鼎鼎19950427
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#include#includeint main(void){ int count,i,m,n; count=0; for(m=2;mn){ printf("%6d",m); count++; if(count%10==0) printf("\n"); } } printf("\n"); return 0;} 阅读全文
posted @ 2013-10-06 10:40
吕鼎鼎19950427
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#includeint main(void){ int x; printf("Enter x:"); scanf("%d",&x); while(x!=0){ printf("%d",x%10); x=x/10; } return 0;} 阅读全文
posted @ 2013-10-06 10:34
吕鼎鼎19950427
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#includeint main(void){ int mark,max; printf("Enter marks:"); scanf("%d",&mark); max=mark; while(mark>=0){ if(max<mark) max=mark; scanf("%d",&mark); } printf("Max=%d\n",max); return 0;} 阅读全文
posted @ 2013-10-06 10:31
吕鼎鼎19950427
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#includeint main(void){ int i,mark,max,n; printf("Enter n:"); scanf("%d",&n); printf("Enter %d marks:",n); scanf("%d",&mark); max=mark; for(i=1;i<n;i++){ scanf("%d",&mark); if(max<mark) max=mark; } printf("Max=%d\n",max); 阅读全文
posted @ 2013-10-06 10:27
吕鼎鼎19950427
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#includeint main(void){ int i,j; double item,sum; sum=0; for(i=1;i<=100;i++){ item=1; for(j=1;j<=i;j++) item=item*j; sum=sum+item; } printf("1!+2!...+100!=%e\n",sum); return 0;} 阅读全文
posted @ 2013-10-06 10:20
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#includedouble fact(int n);int main(void){ int i; double sum; sum=0; for(i=1;i<=100;i++) sum=sum+fact(i); printf("1!+2!+...+100!=%e\n",sum); return 0;}double fact(int n){ int i; double result; result=1; for(i=1;i<=n;i++) result=result+i; return result;} 阅读全文
posted @ 2013-10-06 10:14
吕鼎鼎19950427
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#includeint main(void){ int mynumber=38; int count=0,yournumber; for(count=1;countmynumber) printf("bigger"); else printf("smaller"); } printf("Game is over"); return 0;} 阅读全文
posted @ 2013-10-06 10:04
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#includeint main(void){ int i,m; printf("Enter a number:"); scanf("%d",&m); for(i=2;im/2&&m!=1) printf("%d is a prime number!\n",m); else printf("No!\n"); return 0;} 阅读全文
posted @ 2013-10-06 03:04
吕鼎鼎19950427
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#includeint main(void){ int count,number; count=0; printf("Enter a number:"); scanf("%d",&number); if(number<0)number=-number; do{ number=number/10; count++; }while(number!=0); printf("It contains%d digits.\n",count); return 0;} 阅读全文
posted @ 2013-10-06 03:00
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#includeint main(void){ int count,num; double grade,total; num=0; total=0; count=0; printf("Enter grade:"); scanf("%lf",&grade); while(grade>0){ total=total+grade; num++; if(grade<60) count++; scanf("%lf",&grade); } if(num!=0){ ... 阅读全文
posted @ 2013-10-06 02:53
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#include#includeint main(void){ int denominator,flag; double item,pi; flag=1; denominator=1; item=1.0; pi=0; while(fabs(item)>=0.0001){ item=flag*1.0/denominator; pi=pi+item; flag=-flag; denominator=denominator+2; } pi=pi*4; printf("pi=%.4f\n... 阅读全文
posted @ 2013-10-06 02:47
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#includeint main(void){ double value1,value2; char op; printf("Type in an expression:"); scanf("%lf%c%lf",&value1,&op,&value2); if(op=='+') printf("=%.2f\n",value1+value2); else if(op=='-') printf("=%.2f\n",value1-value2); else if(o 阅读全文
posted @ 2013-10-06 02:41
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#includeint main(void){ int blank,digit,other; char ch; int i; blank=digit=other=0; printf("Enter 10 characters:"); for(i=1;i<=10;i++){ ch=getchar(); switch(ch){ case' ': case'\n': blank++; break; case'0':... 阅读全文
posted @ 2013-10-06 02:32
吕鼎鼎19950427
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#includeint main(void){ double value1,value2; char op; printf("Type in an expression:"); scanf("%lf%c%lf",&value1,&op,&value2); switch(op){ case'+': printf("=%.2f\n",value1+value2); break; case'-': printf("=%.2f\n",value1-value2); . 阅读全文
posted @ 2013-10-06 02:18
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#includeint main(void){ int choice,i; double price; for(i=1;i<=5;i++){ printf("[1]Select crisps\n"); printf("[2]Select popcorn\n"); printf("[3]Select chocolate\n"); printf("[4]Select cola\n"); printf("[0]Select exit\n"); printf("Enter choice: 阅读全文
posted @ 2013-10-06 02:06
吕鼎鼎19950427
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#includeint main(void){ double value1,value2; char op; printf("Type in an expression:"); scanf("%lf%c%lf",&value1,&op,&value2); if(op=='+') printf("=%.2f\n",value1+value2); else if(op=='-') printf("=%.2f\n",value1-value2); else if(o 阅读全文
posted @ 2013-10-06 01:56
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#includeint main(void){ int digit,letter,other; char ch; int i; digit=letter=other=0; printf("Enter 10 characters:"); for(i=1;i='a'&&ch='A'&&ch='0'&&ch<='9') digit++; else other++; } printf("letter=%d,digit=%d,other=%d\n" 阅读全文
posted @ 2013-10-06 01:48
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#includeint main(void){ double x,y; printf("Enter x:"); scanf("%lf",&x); if(x<0){ y=0; } else if(x<=15){ y=4*x/3; } else{ y=2,5*x-10.5; } printf("f(%.2f)=%.2f\n",x,y); return 0;} 阅读全文
posted @ 2013-10-06 01:23
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#includeint main(void){ int count,i,n; double grade,total; printf("Enter n:"); scanf("%d",&n); total=0; count=0; for(i=1;i<=n;i++){ printf("Enter grade#%d:",i); scanf("%lf",&grade); total=total+grade; if(grade<60){ count++; } } ... 阅读全文
posted @ 2013-10-06 01:17
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#includeint main(void){ int number; printf("Enter a number:"); scanf("%d",&number); if(number%2==0){ printf("The number is even.\n"); } else{ printf("The number is odd.\n"); return 0; }} 阅读全文
posted @ 2013-10-06 00:51
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#includeint main(void){ int mynumber=38; int yournumber; printf("Input your number:"); scanf("%d",&yournumber); if(yournumber=mynumber) printf("OK!you are right!\n"); else if(yournumber>mynumber) printf("Sorry!your number is bigger than mynumber!\n"); e 阅读全文
posted @ 2013-10-06 00:36
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#includedouble fact(int n);int main(void){ int i,n; double result; printf("Enter n:"); scanf("%d",&n); for(i=0;i<=n;i++){ result=fact(i); printf("%d!=%.0f\n",i,result); } return 0;}double fact(int n){ int i; double product; product=1; for(i=1;i<=n;i++){... 阅读全文
posted @ 2013-10-06 00:24
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