This article shares the specific code for implementing simple address book in C language for your reference. The specific content is as follows
I wrote one in C language these two daysSimple version of address book (student information management), roughly functions includeAdd information，View information(Automatically sort by name, printf output with color font),Find information(Find by name),Delete information(Enter a name to delete relevant information),Modify information(Enter the name of the modifyer and choose to modify any information) andquit 。
#include <>
#include <>
#include <>
#define SIZE 100
typedef struct student STU;
int person = 0;
struct student
{
char name[10];
int num;
int age;
};
void welcome()
{
system("clear");
printf("\n\n\n\n\t\t\t========================================");
printf("\n\n\t\t\t\t\tWelcome!\n");
sleep(3);
}
void menu()
{
system("clear");
printf("\n\n\t************************************************************************");
printf("\n\t\t\t\t\t\tPlease select:");
printf("\n\t\t\t\t\t\t1.Add information");
printf("\n\t\t\t\t\t\t2.View information");
printf("\n\t\t\t\t\t\t3.Find information");
printf("\n\t\t\t\t\t\t4.Delete information");
printf("\n\t\t\t\t\t\t5.Modify information");
printf("\n\t\t\t\t\t\t6.Exit");
printf("\n\t************************************************************************");
}
/*Add information*/
void AddInfo(STU *s[])
{
system("clear");
printf("Name Student ID Age\n");
printf("------------------------\n");
printf("Please enter information：(byeEnd Add)\n");
while(1)
{
s[person] = (STU*)malloc(sizeof(STU));
if(NULL == s[person])
{
printf("malloc failure!\n");
}
scanf("%s", s[person]->name);
if(!strcmp(s[person]->name, "bye"))
{
break;
}
scanf("%d%d", &s[person]->num, &s[person]->age);
getchar();
person++;
}
}
/*View information (sorted by name)*/
void ShowAll(STU *s[])
{
system("clear");
int i, j;
STU *q[1] = {0};
q[0] = (STU *)malloc(sizeof(STU));
printf("information:\n");
for(i = 0; i < person; i++)
{
for(j = 0; j < person - 1 - i; j++)
{
if(strcmp(s[j]->name, s[j + 1]->name) > 0)
{
q[0] = s[j];
s[j] = s[j + 1];
s[j + 1] = q[0];
}
}
}
for(i = 0; i < person; i++)
{
printf("\e[1;35mname:%s, num:%d, age:%d\e[0m\n", s[i]->name, s[i]->num, s[i]->age);
}
sleep(3);
getchar();
}
/*Find information*/
void Search_name(char *name, STU *s[])
{
int i, n = 0;
for(i = 0; i < person; i++)
{
if(strcmp(name, s[i]->name) == 0)
{
n++;
printf("name:%s, num:%d, age:%d\n", s[i]->name, s[i]->num, s[i]->age);
}
}
if(n == 0)
{
printf("Not exists!\n");
}
}
void SearchInfo(STU *s[])
{
system("clear");
char *name = (char *)malloc(sizeof(char));
printf("Please enter the name of the person you are looking for:\n");
scanf("%s", name);
Search_name(name, s);
}
/*Delete information*/
void DeleteInfo(STU *s[])
{
system("clear");
int i, n = 0, j;
char del_name[10];
printf("Please enter the name of the person you want to delete:\n");
scanf("%s", del_name);
getchar();
getchar();
for(i = 0; i < person; i++)
{
if(strcmp(del_name, s[i]->name) == 0)
{
n++;
free(s[i]);
for(j = i; j < person - 1; j++)
{
strcpy(s[j]->name, s[j + 1]->name);
s[j]->num = s[j + 1]->num;
s[j]->age = s[j + 1]->age;
}
person--;
}
}
if(n == 0)
{
printf("The person to be deleted does not exist!\n");
}
else
{
printf("Delete successfully!\n");
}
}
/*Modify information*/
void Change_name(char *name, STU *s[])
{
int i, n = 0, choice;
char *new_name = (char *)malloc(sizeof(char));
int new_num, new_age;
for(i = 0; i < person; i++)
{
if(strcmp(name, s[i]->name) == 0)
{
n++;
printf("The student's information is as follows:");
printf("name:%s, num:%d, age:%d\n", s[i]->name, s[i]->num, s[i]->age);
printf("----------------------------\n");
printf("Please select what to modify( ):\n");
scanf("%d", &choice);
switch(choice)
{
case 1:
printf("Please enter a new name:\n");
scanf("%s", new_name);
strcpy(s[i]->name, new_name);
break;
case 2:
printf("Please enter a new student number:\n");
scanf("%d", &new_num);
s[i]->num = new_num;
break;
case 3:
printf("Please enter a new age:\n");
scanf("%d", &new_age);
s[i]->age = new_age;
break;
}
}
}
if(n == 0)
{
printf("Not exists!\n");
}
}
void ChangeInfo(STU *s[])
{
system("clear");
char *name = (char *)malloc(sizeof(char));
printf("Please enter the name of the person you want to modify:\n");
scanf("%s", name);
Change_name(name, s);
}
int main()
{
struct student *s[SIZE] = {0};
int choice;
welcome();
while(1)
{
menu();
printf("\nPlease input choice:");
scanf("%d", &choice);
switch(choice)
{
case 1:
AddInfo(s);
break;
case 2:
ShowAll(s);
break;
case 3:
SearchInfo(s);
break;
case 4:
DeleteInfo(s);
break;
case 5:
ChangeInfo(s);
break;
case 6:
exit(0);
break;
}
}
return 0;
}
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.