南京信息工程大学实验4(耿子尧)
1
#include<stdio.h> #define N 4 int main() { int a[N]={2,0,2,2}; char b[N]={'2','0','2','2'}; int i; printf("sizeof(int)=%d\n",sizeof(int)); printf("sizeof(char)=%d\n",sizeof(char)); printf("\n"); for(i=0;i<N;++i) printf("%p:%d\n",&a[i],a[i]); printf("\n"); for(i=0;i<N;++i) printf("%p:%c\n",&b[i],b[i]); printf("\n"); printf("a=%p\n",a); printf("b=%p\n",b); return 0; }
1连续保存,四
2连续保存,一
1.2
#include<stdio.h> #define N 2 #define M 3 int main() { int a[N][M]={{1,2,3},{4,5,6}}; char b[N][M]={{'1','2','3'},{'4','5','6'}}; int i,j; for(i=0;i<N;++i) for(j=0;j<M;++j) printf("%p:%d\n",&a[i][j],a[i][j]); printf("\n"); for(i=0;i<N;++i) for(j=0;j<M;++j) printf("%p:%c\n",&b[i][j],b[i][j]); return 0; }
1一样,4
2一样,1
2
#include<stdio.h> int days_of_year(int year,int month,int day); int main() { int year,month,day; int days; while(scanf("%d%d%d",&year,&month,&day)!=EOF) { days=days_of_year(year,month,day); printf("%4d-%02d-%02d是这一年的第%d天.\n\n",year,month,day,days); } return 0; } int days_of_year(int year,int month,int day) { int flag=0; if(year%4==0&&year%100!=0||year%400==0) flag=1; int days=0; int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31},i; for(i=1;i<month;i++) { days+=a[i]; } days+=day+flag; return days; }
3
#include<stdio.h> #define N 5 void input(int x[],int n); void output(int x[],int n); double average(int x[],int n); void sort(int x[],int n); int main() { int scores[N]; double ave; printf("录入%d个分数:\n",N); input(scores,N); printf("\n输出课程分数:\n"); output(scores,N); printf("\n课程分数处理:计算均分,排序。。。\n"); ave=average(scores,N); sort(scores,N); printf("\n输出课程均分:%.2f\n",ave); printf("\n输出课程分数(高->低):\n"); output(scores,N); return 0; } void input(int x[],int n) { int i; for(i=0;i<n;++i) scanf("%d",&x[i]); } void output(int x[],int n) { int i; for(i=0;i<n;++i) printf("%d ",x[i]); printf("\n"); } double average(int x[],int n) { int i; double s=0.0; for(i=0;i<n;i++) s+=x[i]; return(s/n); } void sort(int x[],int n) { int i,j,p; for(j=1;j<=n-1;j++) { for(i=0;i<n-j;i++) { if(x[i]<x[i+1]) { p=x[i]; x[i]=x[i+1]; x[i+1]=p; } } } }
4
#include<stdio.h> void dec2n(int x,int n); int main() { int x; printf("输入一个十进制整数:"); scanf("%d",&x); dec2n(x,2); dec2n(x,8); dec2n(x,16); return 0; } void dec2n(int x,int n) { int i=0,a[32]; while(x>0) { a[i]=x%n; i=i+1; x=x/n; } if(n<=10) { for(i--;i>=0;i--) { printf("%d",a[i]); } printf("\n"); return; } else { for(i--;i>=0;i--) { switch(a[i]) { case 10:printf("A");break; case 11:printf("B");break; case 12:printf("C");break; case 13:printf("D");break; case 14:printf("E");break; case 15:printf("F");break; default:printf("%d",a[i]);break; } } } return ; }
5
#include<stdio.h> main() { int n,i,j; scanf("%d",&n); for(i=1;i<=n;i++) { for(j=1;j<=i;j++) printf("%d ",j); for(j;j<=n;j++) printf("%d ",i); printf("\n"); } return 0; }
6
#include<stdio.h> #define N 80 int main() { char views1[N] = "hey, c, i hate u."; char views2[N] = "hey, c, i love u."; printf("original views:\n"); printf("views1: %s\n",views1); printf("views2: %s\n",views2); char temp; int i=0; while(views1[i]!='\0') { temp=views2[i]; views2[i]=views1[i]; views1[i]=temp; i++; } printf("\nswapping...\n"); printf("views1: %s\n",views1); printf("views2: %s\n",views2); return 0; }
7
#include<stdio.h> #include<string.h> #define N 5 #define M 20 void bubble_sort(char str[][M], int n); int main() { char name[][M] = { "Bob","Bill","Joseph","Taylor","George" }; int i; printf("输出初始名单:\n"); for (i = 1; i < N; i++) printf("%s\n", name[i]); printf("\n排序中…\n"); bubble_sort(name, N); printf("\n按字典输出名单:\n"); for (i = 1; i < N; i++) printf("%s\n", name[i]); return 0; } void bubble_sort(char str[][M], int n) { int i, j; char t[10]; for(i=0;i<n-1;i++) for(j=0;j<n-i-1;j++) if (strcmp(str[j], str[j + 1]) > 0) { strcpy(t, str[j]); strcpy(str[j], str[j + 1]); strcpy(str[j + 1], t); } }