C語言程序代碼.doc

1、輸出一句話歡迎進(jìn)入C語言 世界#includevoid main()printf(歡迎進(jìn)入C語言世界.n);getchar();2、兩個(gè)數(shù)的交換（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、屏幕輸入兩個(gè)數(shù)相除輸出商#include void main()int x,y;scanf(%d%d,&x,&y);printf(%lfn,(double)x/y);4、固定兩個(gè)數(shù)的交換值#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、屏幕輸入一組數(shù)倒敘輸出結(jié)果#includevoid main()int n,a,b,c;scanf(%d,&n);a=n/100;b=(n/10)%10;c=n%10;printf(n倒序輸出結(jié)果:%d%d%d,c,b,a); 6、屏幕輸入一個(gè)數(shù)，輸出結(jié)果自動(dòng)加1#includevoid main()int i,j;scanf(%d,&i);j=i+;printf(%dt%d,i,j);7、指定數(shù)比較大小#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、屏幕輸入兩個(gè)數(shù)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、屏幕輸入成績判斷成績的等級(jí)（1）#includevoid main()int x;scanf(%d,&x);switch(int)x/10)case 10:case 9:printf(優(yōu)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、屏幕輸入成績對(duì)成績進(jìn)行判斷，通過還是補(bǔ)考#includevoid main()double x;scanf(%lf,&x);if(x=60)printf(通過);elseprintf(補(bǔ)考);11、屏幕輸入題級(jí)結(jié)果，判斷對(duì)錯(cuò)#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(對(duì)n);elseprintf(錯(cuò)n);（2計(jì)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)循環(huán)（雙、多分支）計(jì)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、引用函數(shù)用海倫凱勒公式求三角型面積#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、求屏幕輸入的英文字母的個(gè)數(shù)#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、隨機(jī)給出50個(gè)數(shù)，求平均數(shù)#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、 判斷一個(gè)整數(shù)是否是質(zhì)數(shù)是輸出Y,不是輸出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、數(shù)組 兩個(gè)字符交換#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、用數(shù)組 求字符的個(gè)數(shù)，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（隨機(jī)）自動(dòng)求5個(gè)數(shù) 從大到小排列#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以內(nèi)能被12整除數(shù)的和及個(gè)數(shù)#includevoid main()int