C程序设计谭浩强_第五章课后练习题

本文主要是介绍C程序设计谭浩强_第五章课后练习题，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

第一题

第二题

略

第三题

#include<stdio.h>
#include<math.h>
int main(){int m,n;scanf("%d,%d",&m,&n);int temp;if(m>n) {temp = m;m = n;n = temp;}int n1,n2;for(int i = m;i>0;i--){if(m%i==0 && n%i==0){n1 = i;break;}}printf("最大公约数为：%d\n",n1);for(int i = n;i<=n*m;i++){if(i%m==0 && i%n==0){n2 = i;break;}}printf("最小公倍数为：%d\n",n2);return 0;
}

第四题

#include<stdio.h>
#include<math.h>
int main(){char c;int n1=0,n2=0,n3=0,n4=0;while((c = getchar()) != '\n'){if(c>='a'&&c<='z' || c>='A'&&c<='Z') n1++;else if(c>='0'&&c<='9') n2++;else if(c == ' ') n3++;else n4++;}printf("英文字母总共%d个\n",n1);printf("数字总共%d个\n",n2);printf("空格总共%d个\n",n3);printf("其他字符总共%d个\n",n4);return 0;
}

第五题

#include<stdio.h>
#include<math.h>
int main(){int a,n;int sum = 0;int temp = 0;printf("请按照该格式输入：数字，位数\n");scanf("%d,%d",&a,&n); for(int i = 1;i<=n;i++){temp = temp*10+a;sum += temp;printf("%d\n",temp);}printf("求和结果为：%d\n",sum);return 0;
}

第六题

#include<stdio.h>
#include<math.h>
int main(){double s = 1,sum = 0;for (int i = 1;i<=20;i++){s = 1;for (int j = 1;j<=i;j++){s *= j;}sum += s;}printf("所求结果为: %lf\n",sum);return 0;
}

第七题

#include<stdio.h>
#include<math.h>
int main(){double sum = 0;double s1=0,s2=0,s3=0;for(int i = 1;i<=100;i++){s1 += i;}for (int i = 1;i<=50;i++){s2 += i*i;}for (int i = 1;i<=10;i++){s3 += 1.0/i;}sum = s1+s2+s3;printf("所求结果为：%lf\n",sum);return 0;
}

第八题

#include<stdio.h>
#include<math.h>
int main(){for(int i = 111;i<=999;i++){int k = i;int sum = 0;while(k>0){int m = k%10;sum += m*m*m;k /= 10;}if(sum == i) printf("%d为水仙花数\n",i);}return 0;
}

第九题

#include<stdio.h>
#include<math.h>
int main(){for (int i = 2;i<=1000;i++){int s = 0;for(int j = 1;j<=i/2;j++){if(i%j == 0) s += j;}if(s == i) {printf("%d its factors are 1,",i);for(int n = 2;n<=i/2;n++){if(i%n == 0) printf("%d,",n);}printf("\n");}}return 0;
}

第十题

#include <stdio.h>
int main()
{double a = 2, b = 1, sum = 0;double temp;for (int i = 0; i < 20; i++){sum += a / b;temp = a;a = a + b;b = temp;}printf("前20项之和为:sum=%9.7f\n",sum);return 0;
}

第十一题

#include <stdio.h>
int main()
{double H = 100;int count = 0;double h,sum = 0;while(count < 10){H /= 2.0;h = H;sum += h*2;count ++;}printf("共经过%lf米，第十次反弹%lf米\n",sum+100,h);return 0;
}

第十二题

#include <stdio.h>
int main()
{int sum = 1;for(int i =0;i<9;i++){sum = (sum+1)*2;}printf("一共有%d个桃子\n",sum);return 0;
}

第十三题

#include <stdio.h>
#include <math.h>int main()
{float a, x0, x1;printf("请输入一个正数: ");scanf("%f", &a);x0 = a / 2;x1 = (x0 + a / x0) / 2;do{x0 = x1;x1 = (x0 + a / x0) / 2;} while (fabs(x0 - x1) >= 1e-5);printf("[%f] 的平方根为 [%f]\n", a, x1);return 0;
}

第十四题

#include <stdio.h>
#include <math.h>int  main()
{double x1, x0, f, f1;x1 = 1.5;do{x0 = x1;f = ((2 * x0 - 4) * x0 + 3) * x0 - 6;f1 = (6 * x0 - 8) * x0 + 3;x1 = x0 - f / f1;} while (fabs(x1 - x0) >= 1e-5);printf("方程在1.5附近的根为：%lf\n", x1);return 0;
}

第十五题

#include <stdio.h>
#include <math.h>int  main()
{double left = -10,right = 10,mid;double temp=10;while(fabs(temp)>1e-5){mid = (left+right)/2;temp = 2*mid*mid*mid-4*mid*mid+3*mid-6;if(temp>0){right = mid;}else if(temp<0){left = mid;}}printf("在（10，-10）中的根为%lf\n",mid);return 0;
}

第十六题

#include <stdio.h>
#include <math.h>int  main()
{for(int i = 1;i<=4;i++){for(int k = 1;k<=4-i;k++){printf(" ");}for (int j = 1;j<=2*i-1;j++){printf("*");}printf("\n");}for(int i = 4;i>=1;i--){for(int k = 1;k<=4-i;k++){printf(" ");}for (int j = 2*i-1;j>=1;j--){printf("*");}printf("\n");}return 0;
}

第十七题

#include <stdio.h>int main()
{int A, B, C;for (A = 'X'; A <= 'Z'; A++){for (B = 'X'; B <= 'Z'; B++){for (C = 'X'; C <= 'Z'; C++){//去除限制条件if (A == 'X' || C == 'X' || C == 'Z' || B == A || B == C || A == C){continue;}printf("A对%c\tB对%c\tC对%c", A, B, C);}}}return 0;
}