初学C语言编程.docx

1、初学C语言编程#includevoid main()int a=10,b=11,c1,c2;printf(c1=%d,c2=%dn,c1,c2);c1=+a;c2=b+;printf(c1=%d,c2=%dn,c1,c2);a=10;b=1;c1=a-;printf(c1=%d,c2=%dn,c1,c2);#includevoid main()float PI=3.14,r=3,h=6,l,s,v;l=2*PI*r;s=PI*r*r;v=s*h;printf(%1.2f,%1.2f,%1.2fn,l,s,v);#includevoid main()char a,b;scanf(%c%c,&a,

2、&b);printf(%c%c,a,b);#includevoid main()char a,b;a=getchar();putchar(a,b); #includevoid main()char c1,c2,c3,c4,c5;c1=C,c2=h;c3=i,c4=n;c5=a;printf(%c%c%c%c%cn,c1,c2,c3,c4,c5);c1=c1+4;c2=c2+4;c3=c3+4;c4=c4+4;c5=c5+4;printf(%c%c%c%c%cn,c1,c2,c3,c4,c5);#includevoid main()float c,f;scanf(%f,&f);c=(5.0/9)

3、*(f-32);printf(%2.1f,c);#includevoid main()float a,b,c,s,area;printf(input a,b,c:);scanf(%f,%f,%f,&a,&b,&c);if(a!=0&b!=0&c!=0&a+bc&a+cb&b+ca)s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c);printf(area=%fn,area);elseprintf(It is not a triangle.n);#includevoid main()float a,b,c,x1,x2,p,q;printf(input a,b,c:

4、);scanf(%f,%f,%f,&a,&b,&c);if(b*b-4*a*c0)p=(-b)/2*a;q=sqrt(b*b-4*a*c)/2*a;x1=p+q;x2=p-q;printf(%f,%f,x1,x2);elseprintf(b*b-4*a*c=0);#includevoid main()int x=3,y=2,l;float a=2.5,b=3.5;l=(x+y)%2+(int)a/(int)b;printf(%dn,l);#includevoid main()char a,ch;a=97;ch=a+8-3;printf(ch=%dn,ch);#includevoid main(

5、)float score;printf(input score:);scanf(%f,&score);if(score=60)if(score=80)printf();else printf();else printf();#includevoid main()float score;printf(input score:);scanf(%f,&score);if(score=80)printf();else if (score=60)printf();else printf();#includevoid main()int num;printf(input num:);scanf(%d,&n

6、um);if (num=100)if(num=50)printf(num=50);else printf(50num=100);else if(num=150) printf(100num150);#includevoid main()int a,b;scanf(%d %d,&a,&b);switch(a%2)case 0:switch (b%2)case 0:printf(a,b are even);break;case 1:printf(a is even,b is odd); break;break;case 1: switch(b%2) case 0:printf(a is odd,b

7、 is even); break; case 1:printf(a,b are odd);break; break;1. 编写和调试下列题目的程序：用scanf 函数输入x，求下列函数的y 值#include void main()int x,y;printf(请输入的x值:);scanf(%d,&x);if (x=1&x10)y=2*x-1;elsey=3*x-11;printf(y=%d,y);2. 编写和调试下列题目的程序：将百分制成绩转化为等级成绩，表达式如下，分别用if、switch 语句的进行编程。#include void main()int x;printf(请输入的x值:);

8、scanf(%d,&x);if(x=0&x60)printf(En);switch (x/10)case 6:printf (Dn);break;case 7:printf (Cn);break;case 8:printf (Bn);break;case 9:printf (An);break;#include void main()int x;printf(input x:);scanf(%d,&x);if(x=0&x100)switch (x/10)case 6:printf (Dn);break;case 7:printf (Cn);break;case 8:printf (Bn);br

9、eak;case 9:printf (An);break;default:printf (En);3. 编写程序：输入四个整数，要求从大到小输出。#include void main() int a,b,c,d,t; printf(请输入a,b,c,d的值：n); scanf(%d %d %d %d,&a,&b,&c,&d);if(ba)t=a;a=b;b=t; if(ca)t=a;a=c;c=t; if(da) t=a;a=d;d=t; if(cb)t=b;b=c;c=t;if(db)t=b;b=d;d=t;if(dc)t=c;c=d;d=t; printf(%d,%d,%d,%dn,a,b,c,d);#include void main()int t,a,b,c,d;printf(input a,b,c,d:);scanf(%d %d %d %d,&a,&b,&c,&d);if(ba)t=a;a=b;b=t;if(ca)t=a;a=c;c=t;if(da)t=a;a=d;d=t;if(cb)t=b;b=c;c=t;if(db)t=b;b=d;d=t;if(dc)t=c;c=d;d=t;printf(%d %d %d %d,a,b,c,d);