C语言课后习题.docx
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- 上传时间:2023-02-05
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C语言课后习题.docx
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C语言课后习题
计算调和级数之和
#include
#include
main()
{
doublesum;
intk;
sum=0;
for(k=1;k<=10;k++){
sum+=1.0/k;
}
printf("Thesumis%lf\n",sum);
system("PAUSE");
return0;
}
计算阶乘之和
#include
#include
main()
{
intsum;
intfac;
intn;
intcounter;
printf("Pleaseentern:
");
scanf("%d",&n);
fac=1;
sum=0;
for(counter=1;counter<=n;counter++){
fac*=counter;
sum+=fac;
}
printf("Thesumis%d\n",sum);
system("PAUSE");
return0;
}
找能被7整除或含7的数
#include
#include
main()
{
inti;
for(i=10;i<100;i++){
if(i%7==0||i%10==7||i/10==7){
printf("%4d",i);
}
}
printf("\n");
system("PAUSE");
return0;
}
输入整数,构造逆序数
#include
#include
main()
{
longn;
longm;
intd;
printf("Pleaseenternumber:
");
scanf("%ld",&n);
m=0;
while(n!
=0){
d=n%10;
m=m*10+d;
n/=10;
}
printf("Thereverseis%ld\n",m);
system("PAUSE");
return0;
}
寻找完数
#include
#include
main()
{
intsum;
intcounter;
intn;
for(n=2;n<=10000;n++){
sum=0;
for(counter=1;counter if(n%counter==0){ sum+=counter; } } if(sum==n){ printf("%disaperfectnumber\n",n); } } system("PAUSE"); return0; } 显示三角模式 #include #include #defineN5 main() { intr; intc; for(r=1;r<=N;r++){ for(c=N-r;c>=1;c--){ printf(""); } for(c=1;c<=2*r-1;c++){ printf("*"); } printf("\n"); } system("PAUSE"); return0; } 求平均值与标准差 #include #include #include #defineLENGTH10 main() { doublearray[LENGTH]; doublesum; doubleave; doubledev; inti; for(i=0;i printf("Pleaseenterarray[%d]: ",i); scanf("%lf",&array[i]); } sum=0; for(i=0;i sum+=array[i]; } ave=sum/LENGTH; sum=0; for(i=0;i sum+=(array[i]-ave)*(array[i]-ave); } dev=sqrt(sum/LENGTH); printf("Theaverageis%lf\n",ave); printf("Thestandarddevis%lf\n",dev); system("PAUSE"); return0; } 体操比赛实际得分 #include #include #defineLENGTH7 main() { doublearray[LENGTH]; doublesum; doubleaverage; doublemax; doublemin; inti; for(i=0;i printf("Pleaseenterarray[%d]: ",i); scanf("%lf",&array[i]); } max=array[0]; for(i=1;i if(array[i]>max){ max=array[i]; } } min=array[0]; for(i=1;i if(array[i] min=array[i]; } } sum=0; for(i=0;i sum+=array[i]; } average=(sum-min-max)/(LENGTH-2); printf("Thefinalis%lf\n",average); system("PAUSE"); return0; } 筛选法求素数 #include #include #defineLENGTH99 main() { intarray[LENGTH]; intcounter; inti; for(i=0;i array[i]=i+2; } for(i=0;i if(array[i]! =0){ for(counter=i+1;counter if(array[counter]%array[i]==0){ array[counter]=0; } } } } for(i=0;i if(array[i]! =0){ printf("%4d",array[i]); } } printf("\n"); system("PAUSE"); return0; } 杨晖三角 #include #include #defineN7 main() { intmatrix[N][N]; introw; intcol; for(row=0;row matrix[row][0]=1; } for(col=1;col matrix[0][col]=0; } for(row=1;row for(col=1;col matrix[row][col]=matrix[row-1][col]+matrix[row-1][col-1]; } } for(row=0;row for(col=0;col if(matrix[row][col]! =0){ printf("%4d",matrix[row][col]); } } printf("\n"); } system("PAUSE"); return0; } 九宫格 #include #include #defineN5 main() { intmatrix[N][N]; introw; intcol; intcounter; row=0; col=N/2; for(counter=1;counter<=N*N;counter++){ matrix[row][col]=counter; if(counter%N==0){ row=(row+1)%N; } else{ row=(row-1+N)%N; col=(col+1)%N; } } for(row=0;row for(col=0;col printf("%4d",matrix[row][col]); } printf("\n"); } system("PAUSE"); return0; } 第五章第四题 #include #include intmain(intargc,char*argv[]) { doubleFahToCel(double); doublem; doubleC; printf("\npleaseenterthenumber: "); scanf("%lf",&m); C=FahToCel(m); printf("\nThefahtocelis%lf",C); system("PAUSE"); return0; } doubleFahToCel(doubleF) { doubleC; C=5.00/9*(F-32); return(C); system("PAUSE"); return0; } 第五题 #include #include intmain(intargc,char*argv[]) { intHaveRealRoot(double,double,double); doublea,b,c; printf("\npleaseenternumber1: ",a); scanf("%lf",&a); printf("\npleaseenternumber2: ",b); scanf("%lf",&b); printf("\npleaseenternumber3: ",c); scanf("%lf",&c); intN; N=HaveRealRoot(a,b,c); printf("\nTheHaveRealRootis%d",N); system("PAUSE"); return0; } intHaveRealRoot(doublea,doubleb,doublec) { doubleresult; intN; result=b*b-4*a*c; if(result>=0){ N=2; } else{ N=0; } return(N); system("PAUSE"); return0; } 第七题 #include #include #include intmain(intargc,char*argv[]) { intIsPrime(int); intc; intcounter; for(counter=2;counter<=200;counter++) { c=IsPrime(counter); if(c==1) { printf("\nTheprimeis%d",counter); } } system("PAUSE"); return0; } intIsPrime(intm) { inti; intA; for(i=2;i<=sqrt(m);i++) { if(m%i==0) {break;} } if(i>sqrt(m)) { A=1; } else { A=0; } return(A); } 第十一题 #include #include #defineSTEP8 intmain(intargc,char*argv[]) { doubleAverageArray(inta[],int); inta[STEP]; intcounter; doubleresult; for(counter=0;counter printf("\npleaseentera[%d]: ",counter); scanf("%d",&a[counter]); } result=AverageArray(a,STEP); printf("%lf",result); system("PAUSE"); return0; } doubleAverageArray(inta[],intn){ intcounter; doubleresult,sum; sum=0; for(counter=0;counter { sum+=a[counter]; } result=sum/n; return(result); }
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