C语言操作题常考编程题库

1、C语言编程题覆盖到的算法：1、个人所得税计算；2、求一组数的正、负数（或奇、偶数）的个数和平均值；3、二维数组主、次对角线之和；4、求素数（用函数实现）；5、级数有限项求和问题；6、两个一维数组相加（用函数实现）；7、求最大、最小值；8、判断闰年（用函数实现）；9、求水仙花数；10、百钱百鸡；11、求最大公约数、最小公倍数。12、求回文数；13、排序；14、二维数组的转置；15、递归函数求阶乘；16、求斐波那契数列；17、求和：a+aa+aaa+aaaa+.；18、求符合条件的整数（如：是某个二位数的平方，个位、十位、百位数各不相同等）；（包括素数，回文，完数，等等）19、字符串加密；20、统

2、计字符串中字母和数字的个数；/*1.个人所得税计算，以实验指导P24T5为标准*/#includevoidmain（）inti,n;doublea,b,c;n=i/400;printf(pleaseinputincome:n);scanf(%d,&i);a=(i-800)*0.05,b=20+(i-1200)*0.08,c=84+(i-2000)*0.2;switch(n)case0:case1:printf(不需缴税n);break;case2:printf(需交纳%lf元n,a);break;case3:case4:printf(需交纳%lf元n,b);break;default:prin

3、tf(需交纳%lf元n,c);break;/*2.求一组数的奇数个数，偶数个数和平均值#include#defineN10voidmain()intaN;inti,m=0,n=0,sum=0;doubleaverage;printf(pleaseinput10numbers:n);for(i=0;iN;i+)scanf(%d,&ai);if(ai%2=0)m+;elsen+;sum+=ai;average=(double)sum/N;printf(wehave%doddsand%devensn,n,m);printf(average=%lfn,average);*/*2.求一组数的正数个数和负

4、数个数与平均值*/#include#defineN10voidmain()intaN;inti,m=0,n=0,sum=0;doubleaverage;printf(pleaseinput10numbers:n);for(i=0;i0)m+;elsen+;sum+=ai;average=(double)sum/N;printf(wehave%dpositivenumbersand%dnagetivenumbersn,m,n);printf(theaverage=%lf,average);/*3.求二维数组的主次对角线之和*/#include#defineM5#defineN5voidmain(

5、)intaMN;inti,j,sum1=0,sum2=0;printf(pleaseinputthematrix:n);for(i=0;iM;i+)for(j=0;jN;j+)scanf(%d,&aij);for(i=0,j=0;iM;i+,j+)sum1+=aij;for(i=0,j=N-1;iM;i+,j-)sum2+=aij;printf(主对角线和为dn,sum1);printf(次对角线和为dn,sum2);/*4.调用函数判断素数*/#include#includeintisPrime(intn)inti;for(i=1;isqrt(n);i+)if(n%i=0)return0;r

6、eturn1;voidmain()intn,i;printf(pleaseinputanumbern);scanf(%d,&n);i=isPrime(n);if(i)printf(%disaprimen,n);elseprintf(%disnotaprimen,n);5.级数有限项求和(以格里高利公式求n为例)/#include#includevoidmain()intn=1;doublep=0,t,pi;t=1/(pow(-1),(n+1)*2*(n-1);while(fabs(t)=1e-6)pi+=t;n+;pi=4*p;printf(%lf,pi);/6.两个一维数组相加/*#incl

7、ude#defineN5voidmain()intaN,bN,cN;inti;printf(pleaseinputthefirstarrayaN:n);for(i=0;iN;i+)scanf(%d,&ai);printf(pleaseinputthesecondarraybN:n);for(i=0;iN;i+)scanf(%d,&bi);for(i=0;iN;i+)ci=ai+bi;printf(thesumis:n);for(i=0;iN;i+)printf(%dt,ci);*/6.1调用函数实现/#include#defineN5intf(inta,intb)intsum;sum=a+b;

8、returnsum;voidmain()intaN,bN,cN;inti;printf(pleaseinputthefirstarrayaN:n);for(i=0;iN;i+)scanf(%d,&ai);printf(pleaseinputthesecondarraybN:n);for(i=0;iN;i+)scanf(%d,&bi);for(i=0;iN;i+)ci=f(ai,bi);printf(thesumis:n);for(i=0;iN;i+)printf(%dt,ci);/*7.求一组数的最大最小值*/*#includevoidmain()inti,max,min;inta10;pri

9、ntf(pleaseinputtennumbersn);for(i=0;i10;i+)scanf(%d,&ai);max=a0;min=a0;for(i=1;imax)max=ai;if(aimin)min=ai;printf(maxis%d,minis%dn,max,min);*/*随机数*/#include#includevoidmain()inti,max,min;inta10;for(i=0;i10;i+)ai=rand()%90+10;printf(%dt,ai);max=a0;min=a0;for(i=1;imax)max=ai;if(aimin)min=ai;printf(max

10、=%dtmin=%dn,max,min);/*8.判断闰年*/#includeintf(intn)if(n%4=0&n%100!=0|n%400=0)return1;elsereturn0;voidmain()intn;printf(pleaseinputyear:n);scanf(%d,&n);if(f(n)printf(%d是闰年n,n);elseprintf(%d不是闰年n,n);/*可能会有要输出某一范围内所有闰年，思想一样，用循环调用函数即可*/*9.判断水仙花数(运用循环)#includevoidmain()intn,a,b,c,m;printf(pleaseinputanumbe

11、r:n);scanf(%d,&n);a=n/100;b=n/10%10;c=n%10;m=a*a*a+b*b*b+c*c*c;if(m=n)printf(%disthenumberwewantn,n);elseprintf(%disnotthenumbern,n);*/*9.输出所有水仙花数(调用函数(书P108为循环做法)*/#includeintf(intn)inta,b,c,m;a=n/100;b=n/10%10;c=n%10;m=a*a*a+b*b*b+c*c*c;if(m=n)return1;elsereturn0;voidmain()inti,t;for(i=100;i1000;i

12、+)t=f(i);if(t=1)printf(%dt,i);/10.百钱买百鸡(题目见书P115)/#includevoidmain()inti,j,k;for(i=0;i=20;i+)for(j=0;j=33;j+)for(k=3;k=99;k+=3)if(i+j+k=100)&(5*i+3*j+k/3=100)printf(公鸡d只，母鸡d只，小鸡d只n,i,j,k);/*11.求最大公约数和最小公倍数，函数实现*/#includeintf(intm,intn)inti=1,t;if(mn)t=m;m=n;n=t;while(i=m%n)!=0)m=n;n=i;returnn;intg(i

13、ntm,intn)inti,j;i=f(m,n);j=m*n/i;returnj;voidmain()intm,n,a,b;printf(pleaseinputtwonumbers:n);scanf(%d%d,&m,&n);a=f(m,n);b=g(m,n);printf(最大公约数为dn,a);printf(最小公倍数为dn,b);/12.1输出10-2000之间的回文数(循环)/*#includevoidmain()inti,j,k=0,a;printf(10-2000之间的回文数有：n);for(i=10;i0)j=j*10+a%10;a/=10;if(i=j)printf(%dt,i)

14、;k+;if(k%5=0)printf(n);printf(n);*/12.2输出10-2000之间的回文数(函数调用)/*#includeintf(intn)inti=0;while(n0)i=i*10+n%10;n/=10;returni;voidmain()intn,k;printf(10-2000之间的回文数有：n);for(n=10;n=2000;n+)if(n=f(n)printf(%dt,n);k+;if(k%5=0)printf(n);printf(n);*/12.3判断回文数(循环)/*#includevoidmain()inti,a,j=0;printf(pleaseinp

15、utanumber:n);scanf(%d,&i);a=i;while(a0)j=j*10+a%10;a/=10;if(j=i)printf(%d是回文数n,i);elseprintf(%d不是回文数n,i);*/12.4判断回文数(函数调用)/#includeintf(intn)inti=0;while(n0)i=i*10+n%10;n/=10;returni;voidmain()intn;printf(pleaseinpitanumber:n);scanf(%d,&n);if(n=f(n)printf(%d是回文数n,n);elseprintf(%d不是回文数n,n);/13.排序/选择法

16、/*#include#defineN10voidf(inta,intn)inti,j,k,t;for(i=0;i=n;i+)k=i;for(j=i+1;jn;j+)if(ajak)k=j;if(k!=i)t=ak;ak=ai;ai=t;voidmain()intaN=8,2,34,5,12,78,4,78,76,9;inti=0;intsize=sizeof(a)/sizeof(int);for(i=0;iN;i+)printf(%4d,ai);printf(n);f(a,size);for(i=0;iN;i+)printf(%4d,ai);printf(n);/冒泡法/#include#defineN5voidf(inta,intn)inti,j;intt;for(i=0;in-1;i+)for(j=0;jaj+1)t=aj;aj=aj+1;aj+1=t;*/插入法/#include#defineN5voidf(inta,intn)inti,j;intt;for(i=0;i0&aj-1t)aj=aj-1;-j;aj=t;voidmain()intaN=8,2,34,5,12;inti=0;intsize=sizeo