C语言课程设计-通讯录|c语言程序代码编程小程序设计|c语言课程设计报告课程案例
/*编程建立一通讯簿，存放有姓名、电话号码、住址，然后对通信簿进行查找、添加、修改及删除。*/#includestruct person{ char name[8]; char tel[15]; char addr[50];};
char filename[20];FILE *fp;
void creat();void output();void search();void append();void modify();void delete();
main(){ int m; creat(); while(1) { printf("\n\n添加，请按1"); printf("\n查找，请按2"); printf("\n修改，请按3"); printf("\n删除，请按4"); printf("\n输出，请按5"); printf("\n退出，请按0\n"); scanf("%d",&m); if(m>=0&&m<=5) { switch(m) { case 1: append(); break; case 2: search(); break; case 3: modify(); break; case 4: delete(); break; case 5: output(); break; case 0: exit(); } printf("\n\n操作完毕，请再次选择！"); } else printf("\n\n选择错误，请再次选择！"); }}
void creat(){ struct person one; long s1;
printf("\n请输入通讯簿名："); scanf("%s",filename); if((fp=fopen(filename,"w"))==NULL) { printf("\n不能建立通讯簿！"); exit(); } fprintf(fp,"%-10s%-20s%-50s\n","姓名","电话号码","住址"); printf("\n请输入姓名、电话号码及住址（以0结束）\n"); scanf("%s",one.name); while(strcmp(one.name,"0")) { scanf("%s%s",one.tel,one.addr); fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.addr); scanf("%s",one.name); } fclose(fp);}
void output(){ struct person one;
if((fp=fopen(filename,"r"))==NULL) { printf("\n不能打开通讯簿！"); exit(); } printf("\n\n%20s\n","通 讯 簿"); while(!feof(fp)) { fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr); printf("%-10s%-20s%-50s",one.name,one.tel,one.addr); } fclose(fp);}
void append(){ struct person one;
if((fp=fopen(filename,"a"))==NULL) { printf("\n不能打开通讯簿！"); exit(); } printf("\n请输入添加的姓名、电话号码及住址\n"); scanf("%s%s%s",one.name,one.tel,one.addr); fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.addr); fclose(fp);}
void search(){ int k=0; char namekey[8]; struct person one;
printf("\n请输入姓名:"); scanf("%s",namekey);
if((fp=fopen(filename,"rb"))==NULL) { printf("\n不能打开通讯簿！"); exit(); } while(!feof(fp)) { fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr); if(!strcmp(namekey,one.name)) { printf("\n\n已查到，记录为："); printf("\n%-10s%-18s%-50s",one.name,one.tel,one.addr); k=1; } } if(!k) printf("\n\n对不起，通讯簿中没有此人的记录。"); fclose(fp);}
void modify(){ int m,k=0; long offset; char namekey[8]; struct person one;
printf("\n请输入姓名:"); scanf("%s",namekey);
if((fp=fopen(filename,"r+"))==NULL) { printf("\n不能打开通讯簿！"); exit(); } while(!feof(fp)) { offset=ftell(fp); fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr); if(!strcmp(namekey,one.name)) { k=1; break; } } if(k) { printf("\n已查到，记录为："); printf("\n%-10s%-18s%-50s",one.name,one.tel,one.addr); printf("\n请输入新姓名、电话号码及住址："); scanf("%s%s%s",one.name,one.tel,one.addr); fseek(fp,offset,SEEK_SET); printf("%ld",ftell(fp)); fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.addr); } else printf("\n对不起，通讯簿中没有此人的记录。"); fclose(fp);}
void delete(){ int m,k=0,flag; long offset1,offset2; char namekey[8], valid[4]; struct person one;
printf("\n请输入姓名:"); scanf("%s",namekey); if((fp=fopen(filename,"r+"))==NULL) { printf("\n不能打开通讯簿！"); exit(); } while(!feof(fp)) { offset1=ftell(fp); fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr); if(!strcmp(namekey,one.name)) { k=1; break; } } if(k) { printf("\n已查到，记录为"); printf("\n%-10s%-18s%-50s",one.name,one.tel,one.addr); printf("\n确实要删除,按1；不删除，按0："); scanf("%d",&m); if(m) { fseek(fp,offset1,SEEK_SET); fprintf(fp,"%-10s%-20s%-50s\n","","",""); } } else printf("\n对不起，通讯簿中没有此人的记录。"); fclose(fp);}
