简单C语言程序的例子
例子:
#include
main ()
{
tips(); /*caller*/
printf(“\n Success is about banging on after others have let go”);
}
tips() /*caller*/
{
printf (“\n When you reach the end of the rope tie a knot & hang on”,)0; }
[上述程序的输出结果如下:
When you reach the end of the ropt tie a knot & hang on.
Success is about hanging on after others have let go.]
#include
main()
{
int a,fact;
printf(“\nEnter any number”);
scanf(“%d”,&a);
fact=rec(a);
printf(“Factorial value is%d”,fact);
}
rec(x);
int x;
{
int f;
if(x==1)
return(1);
else
f=x*rec(x-1);
return(f);
}
[其显示的结果为:Factorial value is 2.]
比较两个数较大的那个:
#include
main()
{
int a,b,max;
scanf (“%d%d”,&a,&b);
if (a>b)
max=a;
else max=b;
printf (“%d”,max);
}
输出a+b的值:
#include
void main()
{
int a,b,x;
scanf (“%d%d”,&a,&b);
x=a+b;
printf (“%d”,x);
}
输出a,b中最大的一位数:
#include
int max(int x,int y)
{
int z;
if (x>y) z=x;
else z=y;
return(z);
}
void main()
{
int a,b,c;
scanf (“%d%d”,&a,&b);
c=max(a,b);
printf (“%d\n”,c);
}
输出Hello:
#include
int main()
{
printf (“Hello!”);
return 0;
}
求1~100的和:
#include
int main()
{
int s,n;
s=0,n=1;
A: s=s+n;
n=n+1;
if (n<=100)
goto A;
printf (“%d”,s);}
请输入一个三位数,将其各位逆序输出:(如153,输出351)
#include
void main()
{
int x,y,a,b,c;
printf ("请输入一个三位数的数:");
scanf("%d",&x);
a=x/100;
b=x%100/10;
c=x%10;
y=c*100+b*10+a;
printf ("\n%d",y);
}
#include
void main()
{
int x,a,b,c,d;
printf ("请输入一个三位数的数:");
scanf("%d",&x);
a=x/100;
b=x%100/10;
c=x%10;
d=c*100+b*10+a;
printf ("\n%d\n",d);
}
买鸡:
#include
void main()
{
int x,y,z;
if(x>=0&&x<=19,y>=0&&y<=33,z>=0&&z<=100) while (x=19)
{
x=0;
5*x+3*y+z/3==100&&x+y+z==100;
x=x+1;
}
printf("%d%d%d",x,y,z);
}
y==(100-5*x-z/3)/3&&y==100-x-z;
z==(100-5*x-3*y)*3&&z==100-x-y;
#include
void main()
{
int x=0,y,z;
while (x<=19)
{
5*x+3*y+z/3==100&&x+y+z==100;
x=x+1;
printf("%d%d%d",x,y,z);
}
}
#include
void main()
{
int x=0,y=0,z=0;
while (x<=19)
{
while (y<=33)
{
while (z<=100)
{
z==(100-5*x-3*y)*3&&z==100-x-y;
z=z+1;
printf("%d\t",z);
}
y==(100-5*x-z/3)/3&&y==100-x-z;
y=y+1;
printf("%d\t",y);
}
x=x+1;
printf("%d\t",x);
}
}
计算x=20+3(x-1):
#include
void main()
{
int age(int x)
int i,j;
scanf(“%d”,&i);
j=age(i);
printf(“age=%d\n”,j);
}
int age(int x)
{int z;
if(x==1) z=20;
else z=age(x-1)+3;
return(z);
}
编写程序求圆柱体的表面积和体积:
#include
#define PI 3.14 /*定义PI为符号常量,值为3.14*/ void main()
{
float r,h,s,v;
printf(“请输入半径r和高h的值:\n”);
scanf(“%f%f”,&r,&h); /*输入半径r和高h*/
s=2*PI*r*h; /*计算圆柱体表面积*/ v=PI*r*r*h; /*计算圆柱体体积*/ printf(“s=%f,v=%f\n”,s,v);
}
自增,自减运算符的使用:
#include
void main()
{
int i=5,j=5;
int x,y;
x=i++;
y=++j;
printf(“%d\t%d\n”,-x++,-(++y));
printf(“%d\t%d\t%d\t%d\n”,i,j,x,y);
}
自增、自减运算符的基本运算:
#include
void main()
{
int k=4;
int x,y,z;
x=18-k++;
printf(“x=%d”,x);
printf(“k=%d\n”,k);
y=++k+6;
printf(“y=%d”,y);
printf(“k=%d\n”,k);
z=++k+k++;
printf(“z=%d\n”,z);
}
结果:x=14,k=5;y=12,k=6;z=14.
输出单个字符:
#include
void main()
{
char a,b;
a=?o?;
b=?k?;
putchar(a);
putchar(b);
putchar(…\n?);
}
输入字符举例:
#include
void main()
{
char c;
c=getchar(); /*从键盘读入一个字符*/ putchar(c); /*显示输入的字符*/
}
猜数游戏:
#include
#include
#include
int main()
{
int x,i=0,guess;
srand(time(NULL));
x=rand()%100+1;
printf("请你猜数:");
do
{
scanf("%d",&guess);
if(x { printf ("你猜大了!\n"); } else { if(x>guess) printf("你猜小了!\n"); else { printf("你赢了!\n"); break; } } i++; if (i>=10) { printf("随机数是:%d\n",x); printf("你已经猜错了10次,我赢了,哈哈!\n"); break; } printf("请你再猜:"); }while(1); } #include void main() { int a=2,*p=&a,*q=&a; Printf("%d,%d\n",*p++,*(q++)); P=&a;q=&; Printf ("%d%d\n",*p,(*q)++); Printf("%d%d\n",*p,++(*q); } 结果为:2,2 2,2 4,4 (从又向左算) #include V oid main() { Int a,b,c; Int *pa,*pb,*pc; Pa=&a;pb=&b;pc=&c; Scanf ("%d%d",pa,pb); Printf ("a=%d,b=%d\n",*pa,*pb); C=a+b; Printf ("c=%d\n",*pc); *pc=a+*pb; Printf ("c=%d 从100到200之间有哪些数除4多2,除7多3,除9多5?#include int main() { for(int i = 100; i <= 200 ; i++) if(i%4==2&&i%7==3&&i%9==5) printf("%d\n",i); return 0; } 用选择法对10个整数排序: #include V oid main() { Int *p,i,a[10]; P=a; For (i=0;i<10;i++) Scanf (