cfree题目2C语言典型程序.docx
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cfree题目2C语言典型程序.docx
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cfree题目2C语言典型程序
1、输入两个实数,按代数值由小到大的顺序输出这两个数。
(P87,例4.2)
#include
intmain()
{floata,b,t;
printf("请输入两个实数:
");
scanf("%f,%f",&a,&b);
if(a>b)
{t=a;
a=b;
b=t;
}
printf("%5.2f,%5.2f\n",a,b);
return0;
}
2、输入3个数a,b,c,要求按由小到大的顺序输出。
(P88,例4.3)
#include
intmain()
{floata,b,c,t;
printf("请输入三个实数:
");
scanf("%f,%f,%f",&a,&b,&c);
if(a>b)
{
t=a;
a=b;
b=t;
}
if(a>c)
{
t=a;
a=c;
c=t;
}
if(b>c)
{
t=b;
b=c;
c=t;
}
printf("%5.2f,%5.2f,%5.2f",a,b,c);
return0;
}
3、P86例4.1
#include
#include
intmain()
{doublea,b,c,disc,x1,x2,p,q;
scanf("%lf,%lf,%lf",&a,&b,&c);
disc=b*b-4*a*c;
if(disc<0)
printf("Thisequationhasn'trealroots\n");
else
{p=-b/(2.0*a);
q=sqrt(disc)/(2.0*a);
x1=p+q;x2=p-q;
printf("realroots:
\nx1=%7.2f\nx2=%7.2f\n",x1,x2);
}
return0;
}
4、P82第一题
#include
#include
intmain()
{
floatp,r,n;
r=0.1;n=10;p=pow(1+r,n);
printf("p=%f\n",p);
return0;
}
5、P99例4.4
#include
intmain()
{charch;
scanf("%c",&ch);
ch=(ch>='A'&&ch<='Z')?
(ch+32):
ch;
printf("%c\n",ch);
return0;
}
6、P100例4.5
#include
intmain()
{
intx,y;
scanf("%d",&x);
if(x<0)
y=-1;
else
if(x==0)y=0;
elsey=1;
printf("x=%d,y=%d\n",x,y);
return0;
}
7、P15第六题
#include
intmain()
{
inta,b,c,max;
printf("pleaseinputa,b,c:
\n");
scanf("%d,%d,%d",&a,&b,&c);
max=a;
if(max
max=b;
if(max max=c; printf("Thelargestnumberis%d\n",max); return0; } 8、P84第七题 #include intmain() { floath,r,l,s,sq,vq,vz; floatpi=3.141526; printf("请输入圆半径r,圆柱高h: "); scanf("%f,%f",&r,&h); l=2*pi*r; s=r*r*pi; sq=4*pi*r*r; vq=3.0/4.0*pi*r*r*r; vz=pi*r*r*h; printf("圆周长为: l=%6.2f\n",l); printf("圆面积为: s=%6.2f\n",s); printf("圆球表面积为: sq=%6.2f\n",sq); printf("圆球体积为: v=%6.2f\n",vq); printf("圆柱体积为: vz=%6.2f\n",vz); return0; } 9、P112第六题 #include intmain() { intx,y; printf("输入x: "); scanf("%d",&x); if(x<1) {y=x; printf("x=%3d,y=x=%d\n",x,y);} elseif(x<10) {y=2*x-1; printf("x=%d,y=2*x-1=%d\n",x,y);} else {y=3*x-11; printf("x=%d,y=3*x-11=%d\n",x,y);} return0; } 10、编写程序,输入a、b、c三个数,打印出最大者。 #include"stdio.h" voidmain() { inta,b,c,t; printf("Inputthreenumbers: "); scanf("%d,%d,%d",&a,&b,&c); printf("a=%d,b=%d,c=%d\n",a,b,c); if(a>b){t=a;a=b;b=t;} if(a>c){t=a;a=c;c=t;} if(b>c){t=b;b=c;c=t;} printf("MAX=%d\n",c); return0; } 11、编写程序,输入一个整数,打印出它是奇数还是偶数。 #include"stdio.h" voidmain() {inta; printf("请输入一个数: "); scanf("%d",&a); if(a%2==0) printf("a是偶数\n"); else printf("a是奇数\n"); return0; } 12、P82第二题 #include #include intmain() { floatr5,r3,r2,r1,r0,p,p1,p2,p3,p4,p5; p=1000;r5=0.0585;r3=0.054;r2=0.0468;r1=0.0414;r0=0.0072; p1=p*((1+r5)*5); p2=p*(1+2*r2)*(1+3*r3); p3=p*(1+3*r3)*(1+2*r2); p4=p*pow(1+r1,5); p5=p*pow(1+r0/4,4*5); printf("p1=%10.2f\n",p1); printf("p2=%10.2f\n",p2); printf("p3=%10.2f\n",p3); printf("p4=%10.2f\n",p4); printf("p5=%10.2f\n",p5); return0; } 13、P33例2.16 #include intmain() { inti,t; t=1; i=2; while(i<=5) {t=t*i; i=i+1; } printf("%d\n",t); return0; } 14、P33例2.17 #include intmain() { intsign=1; doubledeno=2.0,sum=1.0,term; while(deno<=100) { sign=-sign; term=sign/deno; sum=sum+term; deno=deno+1; } printf("%f\n",sum); return0; } 15、P38例3.2 #include intmain() { floatp0=1000,r1=0.0036,r2=0.0225,r3=0.0198,p1,p2,p3; p1=p0*(1+r1); p2=p0*(1+r2); p3=p0*(1+r3/2)*(1+r3/2); printf("p1=%f\np2=%f\np3=%f\n",p1,p2,p3); return0; } 16、P59例3.4 #include #include intmain() { doublea,b,c,s,area; a=3.67; b=5.43; c=6.21; s=(a+b+c)/2; area=sqrt(s*(s-a)*(s-b)*(s-c)); printf("a=%f\tb=%f\tc=%f\t",a,b,c); printf("area=%f\n",area); return0; } 17、P78例3.8 #include intmain() { chara='B',b='O',c='Y'; putchar(a); putchar(b); putchar(c); putchar('\n'); return0; } 18、P100例4.5 #include intmain() { intx,y; scanf("%d",&x); if(x<0) y=-1; else if(x==0)y=0; elsey=1; printf("x=%d,y=%d\n",x,y); return0; } 19、P102例4.6 #include intmain() { chargrade; scanf("%c",&grade); printf("Yourscore: "); switch(grade) { case'A': printf("85~100\n");break; case'B': printf("70~84\n");break; case'C': printf("60~69\n");break; case'd': printf("<60\n");break; default: printf("enterdataerror! \n"); } return0; } 20、P113第八题 #include intmain() { floatscore; chargrade; printf("请输入学生成绩: "); scanf("%f",&score); while(score>100||score<0) {printf("\n输入有误,请重新输入: "); scanf("%f",&score);} switch((int)(score/10)) { case10: case9: grade='A';break; case8: grade='B';break; case7: grade='C';break; case6: grade='D';break; case5: case4: case3: case2: case1: case0: grade='E'; } printf("成绩是%5.1f,相应的等级是%c\n",score,grade); return0; } 21、P113第十题第一小问 #include intmain() { inti; doublebonus,bon1,bon2,bon4,bon6,bon10; bon1=100000*0.1; bon2=bon1+100000*0.075; bon4=bon2+100000*0.05; bon6=bon4+100000*0.03; bon10=bon6+400000*0.015; printf("请输入利润i: "); scanf("%d",&i); if(i<=100000)bonus=i*0.1; elseif(i<=200000)bonus=bon1+(i-100000)*0.075; elseif(i<=400000)bonus=bon2+(i-200000)*0.05; elseif(i<=600000)bonus=bon4+(i-400000)*0.03; elseif(i<=1000000)bonus=bon6+(i-600000)*0.015; elsebonus=bon10+(i-1000000)*0.01; printf("奖金是: %10.2f\n",bonus); return0; } 22、P113第十题第二小问 #include intmain() { inti; doublebonus,bon1,bon2,bon4,bon6,bon10; intbranch; bon1=100000*0.1; bon2=bon1+100000*0.075; bon4=bon2+200000*0.05; bon6=bon4+200000*0.03; bon10=bon6+400000*0.015; printf("请输入利润i: "); scanf("%d",&i); branch=i/100000; if(branch>10)branch=10; switch(branch) { case0: bonus=i*0.1;break; case1: bonus=bon1+(i-100000)*0.075;break; case2: case3: bonus=bon2+(i-200000)*0.05;break; case4: case5: bonus=bon4+(i-400000)*0.03;break; case6: case7: case8: case9: bonus=bon6+(i-600000)*0.015;break; case10: bonus=bon10+(i-1000000)*0.01; } printf("奖金是%10.2f\n",bonus); return0; } 23、、P113第十一题 #include intmain() { intt,a,b,c,d; printf("请输入四个数: "); scanf("%d,%d,%d,%d",&a,&b,&c,&d); printf("a=%d,b=%d,c=%d,d=%d\n",a,b,c,d); if(a>b){t=a;a=b;b=t;} if(a>c){t=a;a=c;c=t;} if(a>d){t=a;a=d;d=t;} if(b>c){t=b;b=c;c=t;} if(b>d){t=b;b=d;d=t;} if(c>d){t=c;c=d;d=t;} printf("排序结果如下: \n"); printf("%d%d%d%d\n",a,b,c,d); return0; } 24、P17例2.1 #include intmain() { inti=2,p=1; while(i<=5) {p=p*i; i++;} printf("p=%d\n",p); return0; } 25、判断某一年是否为闰年 #include intmain() { intyear,leap; printf("enteryear: "); scanf("%d",&year); if(year%4==0) { if(year%100==0) { if(year%400==0) leap=1; else leap=0; } else leap=1; } else leap=0; if(leap) printf("&dis",year); else printf("%disnot",year); printf("aleapyear.\n"); return0; }
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