中山大學(xué)《高級語言程序設(shè)計(一)》實踐試題

考核試題及答案1.1,2,3,4個數(shù)字,都是多少?輸出這些三位數(shù).解答:main(){inta[4]={1,2,3,4};inti,j,k;for(i=0;i<4;i++){for(j=0;j<4;j++){for(k=0;k<4;k++){if((i!=j)&&(j!=k)&&(i!=k)){printf("%8d",a*100+a[j]*10+a[k]);}}printf("n");}}}2.有一個整數(shù),100后是一個完全平方數(shù),168又是一個完全平方數(shù),少?解答:#includemain(){inti=10,j;longm=268,n=100;charflag='n';while(flag=='n'){for(j=i+1;j<=sqrt(m);j++){if(m==(long)(j*j)){printf("%dn",flag='y';break;}}i++;n=(long)i*i;m=n+168;}}試題3.編寫C程序,要求能讀入一正整數(shù)n,(n<10),并輸出如下圖形:122233333...nnnnn...nnnnn(2n-1個n)...333332221解答:main(){inti,j,n;printf("Pleaseinputn(1~9):n");scanf("%d",&n);for(i=1;i<=n;i++){for(j=0;jprintf("");for(j=0;j<2*i-1;j++)printf("%d",i);printf("n");}for(i=n-1;i>=1;i--){for(j=0;jprintf("");for(j=0;j<2*i-1;j++)printf("%d",i);printf("n");}}4.C,要求能讀入兩個整數(shù)m與n,計算并讀出m與n.解答:main(){intm,n,a,b,t,div,mul;printf("Pleaseinputscanf("%d,%d",&m,&n);if(m<0)m=-m;if(n<0)n=-n;if((m==0)||(n==0)){div=0;mul=0;}else{if(m<N){a=n;b=m;}else{a=m;b=n;}do{t=a%b;a=b;b=t;}while(t!=0);div=a;mul=m*n/a;}printf("themaximumcommondivisorof%d,%dis:%dn",m,n,div);printf("theminimumcommonmultipleof%d,%dis:%dn",m,n,mul);}5.e=1+1/1!+1/2!+1/3!+...+1/n!,e的近似值.10-6,程序給出如下,請完成程序,實現(xiàn)以上功能.#includemain(){inti=1;floate,n;e=1.0;n=1.0;******在此編寫代碼******}fun(inti){intj,k;k=1;for(j=1;j<=i;++j)k=k*j;return(k);}解答:#includemain(){inti=1;floate=1.0,n=1.0;do{n=fun(i);e+=1.0/n;i++;}while(1.0/n>=1e-6);printf("e=%fn",e);}fun(inti){intj,k;k=1;for(j=1;j<=i;++j)k=k*j;return(k);}6.100~200之間的所有素數(shù),.(1的自然數(shù))解答:main(){inti,j;for(i=100;i<=200;i++){for(j=2;j{if(i%j==0)break;}if(i==j)printf("%4d",i);}}7.fun(str),它的功能是:統(tǒng)計由實參傳來的一個字符中的字母,數(shù)字,空格和其它字符的個數(shù)部分源程序給出如下,main,fun的花括號中填入你編寫的若干語句.#includeintalph,digit,space,others;main(){chartext[80];printf("n請輸入一個字符串gets(text);printf字符串是puts(text);alph=digit=space=others=fun(text);printf("n%d個字母%d%d%d個其它字符alph,digit,space,others);}fun(str)char{............}解答:#includeintalph,digit,space,main(){chartext[80];printf("pleaseinputacharacterstring:n");gets(text);printf("thecharacterstringputs(text);alph=digit=space=others=fun(text);printf("alphnumber:%d,digitnumber:%d,spacenumber:%d,othersnumber:%dn",alph,digit,space,others);}fun(str)charstr[];{inti=0;while(str!=''){if((('a'<=str)&&(str<='z'))||(('A'<=str)&&(str<=alph++;elseif(('0'<=str)&&(str<=digit++;elseif(str=='')space++;elseothers++;i++;}return;}8.編寫一個程序,:3x3的矩陣轉(zhuǎn)置,例如:運行程序時,3x3的矩陣123456789轉(zhuǎn)置后的矩陣為:147258369:main(){inta[3][3],b[3][3],i,j;printf("Pleaseinputamatrix:n");for(i=0;i<3;i++)for(j=0;j<3;j++){scanf("%d",&a[j]);b[j]=a[j];}for(i=0;i<3;i++){for(j=0;j<3;j++)printf("%8d",printf("n");}}9..(用循環(huán)語句,行數(shù)可變,8行11211102131693141584567解答:main(){inti,j,m=1,n,a[80][80];printf("pleaseinputn:n");scanf("%d",&n);for(i=0;i<(n+1)/2;i++){for(j=i;j{a[j]=m++;}for(j=i+1;j{a[n-i-1][j]=m++;}for(j=n-i-2;j>=i;j--){a[j][n-i-1]=m++;}for(j=n-i-2;j>i;j--){a[j]=m++;}}for(i=0;i{for(j=0;j{printf("%4d",a[j]);}printf("n");}}試題10.正讀和反讀都一樣的字符串稱為回文字符串,在鍵盤上輸入一個字符串,判別它是否回文字符串(字符串中字符的個數(shù)不得少于10).解答:#includemain(){charstr[80],flag='y';inti=0,j;printf("pleaseinputastring:n");gets(str);j=strlen(str);j--;while(i<=j){if(str!=str[j]){flag='n';break;}else{i++;j--;}}if(flag=='n')printf("thestringisnotpalindrome!n");elseprintf("thestringispalindrome!n");}1n<=1試題11.y(n){,編寫程序計算y(n),要求能y(n-2)+2*y(n-1)n>1對讀入的任意n(n>=0且n<50),能計算并輸出y(n)的值.解答:inty(intn){if(n<=1)return(1);elsereturny(n-2)+2*y(n-1);}main(){intn,f;printf("pleaseinputn:n");scanf("%d",&n);f=y(n);printf("y(n)=%dn",f);}試題12.編寫C程序,要求能讀入一個字符串(100以內(nèi)個字符,其中有空格),計算并輸出該字符串中所有大寫英文字母的個數(shù).解答:#includemain(){inti=0,n=0;charstr[100];printf("pleaseinputastring:n");gets(str);while(str!=''){if(('A'<=str)&&(str<='Z'))i++;}printf("thenumberis:%dn",n);}13.一個整數(shù),100,168又是一個完全平方數(shù),,100000以內(nèi)的整數(shù)中找出所有滿足上述性質(zhì)的整數(shù).解答:#includemain(){inti=10,j;longm=268,n=100;while(n<100000){for(j=i+1;j<=sqrt(m);j++){if(m==(long)(j*j)){printf("%8d",break;}}i++;n=(long)i*i;m=n+168;}printf("n");}試題14.編寫程序,求1到100之間的奇數(shù)之和及偶數(shù)之和,并將二者輸出.解答:main(){inti;intoddSum=0,evenSum=0;for(i=1;i<=100;i++){if(i%2==1)oddSum+=i;elseevenSum+=i;}printf("theoddnumbersumis:%dn",oddSum);printf("theevenunmbersumis:%dn",evenSum);}15.編寫程序計算PI公式如下PI/4=(1-1/3+1/5-1/7+...),0.0001止0.0001).解答:#include"math.h"main(){floatpi=0.0,n=1.0,s=1.0,do{t=s/n;pi+=t;s*=-1.0;n+=2;}while(fabs(t)>=1e-4);pr