C语言程序代码.doc

1、输出一句话欢迎进入C语言 世界#includevoid main()printf(欢迎进入C语言世界.n);getchar();2、两个数的交换（1）#includevoid main()int x,y;x=18;y=19;printf(x=%d,y=%dn,x,y); x=x+y;y=x-y;x=x-y;printf(x=%d,y=%dn,x,y);（2）#includevoid main()int x,y,z;x=18;y=19;z=x;x=y;y=z;printf(%d,%d,x,y);3、屏幕输入两个数相除输出商#include void main()int x,y;scanf(%d%d,&x,&y);printf(%lfn,(double)x/y);4、固定两个数的交换值#includevoid main()int x,y;x=18;y=19;printf(x=%d,y=%dn,x,y); x=x+y;y=x-y;x=x-y;printf(x=%d,y=%dn,x,y);5、屏幕输入一组数倒叙输出结果#includevoid main()int n,a,b,c;scanf(%d,&n);a=n/100;b=(n/10)%10;c=n%10;printf(n倒序输出结果:%d%d%d,c,b,a); 6、屏幕输入一个数，输出结果自动加1#includevoid main()int i,j;scanf(%d,&i);j=i+;printf(%dt%d,i,j);7、指定数比较大小#includevoid main()int i,j;i=2;j=3;printf(%dn,ij);printf(%dn,i=j);printf(%dn,i!=j);printf(%dn,i=j);8、屏幕输入两个数求和除以2#includevoid main()int a,b;double x;scanf(%d%d,&a,&b);x=(a+b)/2.0;printf(%lfn,x);9、屏幕输入成绩判断成绩的等级（1）#includevoid main()int x;scanf(%d,&x);switch(int)x/10)case 10:case 9:printf(优秀n);break;case 8:printf(良好n);break;case 7:printf(中等n);break;case 6:printf(及格n);break;default:printf(不及格n);（2）#includevoid main()int x;scanf(%d,&x);switch(int)x/10)case 9:printf(A);break;case 8:printf(B);break;case 7:printf(C);break;case 6:printf(D);break;default:printf(E);10、屏幕输入成绩对成绩进行判断，通过还是补考#includevoid main()double x;scanf(%lf,&x);if(x=60)printf(通过);elseprintf(补考);11、屏幕输入题级结果，判断对错#includevoid main()int x,y,r,z;char c;scanf(%d%c%d=,&x,&c,&y);scanf(%d,&r);switch(c)case+:z=x+y;break;case-:z=x-y;break;case*:z=x*y;break;case/:z=x/y;break;if(r=z)printf(对n);elseprintf(错n);（2计算器）#includevoid main()int x,y,r,z;char c;scanf(%d%c%d=,&x,&c,&y);scanf(%d,&r);switch(c)case+:z=x+y;break;case-:z=x-y;break;case*:z=x*y;break;case/:z=x/y;break;Printf(“%dn”,z);(3)循环（双、多分支）计算器#includevoid main()int x,y,z;char c;scanf(%d%c%d=,&x,&c,&y);if(c=+)z=x+y;else if(c=-)z=x-y;else if(c=*)z=x*y;else z=x/y;printf(%dn,z);12、引用函数用海伦凯勒公式求三角型面积#include#includedouble gets(int x,int y,int z)double s,p;p=(x+y+z)/2.0;s=sqrt(p*(p-x)*(p-y)*(p-z);return s;void main()int a,b,c;double s;scanf(%d%d%d,&a,&b,&c);printf(%lf,s);13、求屏幕输入的英文字母的个数#include void getcount() char x; int i=0; scanf(%c,&x); while(x!=n) if(x=a & x=A & x=Z) i+; scanf(%c,&x); printf(%dn,i); void main() getcount(); 14、随机给出50个数，求平均数#include#include#includevoid main()int cj50,i,s=0;srand(time(NULL); for(i=0;i50;i+)cji=rand()%100;s+=cji;printf(%dt,cji);if(i+1)%5=0)printf(n);printf(%lfn,s/50.0);15、 判断一个整数是否是质数是输出Y,不是输出N#includechar ss(int x)int i;for(i=2;i=x)returnY;elsereturnN;void main()int x;scanf(%d,&x);printf(%cn,ss(x);16、数组 两个字符交换#includevoid swap(char a)char c;c=a0;a0=a1;a1=c;void main()char x2;scanf(%c%c,&x0,&x1);swap(x);printf(%ct%cn,x0,x1);17、用数组 求字符的个数，在copy一遍 #include void getcount() char x; int i=0; scanf(%c,&x); while(x!=n) if(xa & x=A & x=Z) i+; scanf(%c,&x); printf(%dn,i); int count(char a)int i=0;while(ai!=0)i+;return i;void main() char x100;gets(x);puts(x);printf(%dn,count(x);18（随机）自动求5个数 从大到小排列#include#include#includevoid findmin(int x)int min,mini,i,t,j;for(j=0;j4;j+)min=xj;mini=j;for(i=j+1;ixi)min=xi;mini=i;t=xmini;xmini=xj;xj=t;void main()int a5,i;srand(time(NULL);for(i=0;i5;i+)ai=rand()%100+1;printf(%dt,ai);findmin(a);printf(n);for(i=0;i0，y=1如果x=0，y=0如果x0,y= -1#includevoid main()double x;int y;scanf(%lf,&x);if(x0)y=1;else if(x=0)y=0;elsey=-1;printf(%dn,y);20 求100以内能被12整除数的和及个数#includevoid main()int