#include <stdio.h>

#include <string.h>

struct Book

{

char name[30], author[30], publisher[30];

int quantity,id;

};

main() {

int Max;

char cg[5],t;

printf("Enter number of book: ");

printf("\t\t\t Add Book");

scanf("%d",&Max);

struct Book lib[Max];

int count = 0;

int choice, i, bid, found;

for(i=0;i<Max;i++)

{

printf("Enter Book ID: ");

scanf("%d", &lib[count].id);

printf("Enter Book Name: ");

scanf("%s", lib[count].name);

printf("Enter Author Name: ");

scanf("%s", lib[count].author);

printf("Enter Publisher Name: ");

scanf("%s", lib[count].publisher);

printf("Enter Quantity: ");

scanf("%d", &lib[count].quantity);

printf("Book added successfully.\n");

}

k:printf("\n====== Library Management ======\n");

printf("1. View Books\n");

printf("2. Return Book\n");

printf("3. Issue Book\n");

printf("Enter your choice: ");

scanf("%d", &choice);

switch (choice)

{

case 1:

printf("Enter Book ID to return: ");

scanf("%d", &bid);

for (i = 0; i < Max; i++)

{

if (lib[i].id == bid) {

printf("\nID\tName\t\tAuthor\t\tPublisher\tQuantity\n");

for (i = 0; i < count; i++) {

printf("%d\t%-12s\t%-12s\t%-12s\t%d\n",lib[i].id,lib[i].name,lib[i].author,lib[i].publisher,lib[i].quantity);

goto x;

}

}

else

printf("\n\t\tnot found\n");

x:break;

case 2:

printf("Enter Book ID to return: ");

scanf("%d", &bid);

found = 0;

for (i = 0; i < count; i++) {

if (lib[i].id == bid) {

lib[i].quantity++;

printf("Book returned successfully.\n");

found = 1;

break;

}

}

if (!found)

printf("Book ID not found.\n");

break;

case 3:

printf("Enter Book ID to issue: ");

scanf("%d", &bid);

found = 0;

for (i = 0; i < count; i++) {

if (lib[i].id == bid)

{

if (lib[i].quantity > 0) {

lib[i].quantity--;

printf("Book issued successfully.\n");

} else {

printf("Book not available.\n");

}

}

break;

}

}

if (!found)

{

printf("Book ID not found.\n");

break;

}

break;

default:

printf("Invalid choice! Try again.\n");

}

printf("if want to agin this proses Yes or No : ");

scanf("%s",cg);

scanf("%c",&t);

if(cmp("yes",cg)==0||cmp("Yes",cg)==0||cmp("YES",cg)==0)

{

goto k;

}

}

#include <stdio.h>

struct

{

char n[20];

struct

{

int m[10],t;

float a;

}d;

}v[25];

main()

{

int np,i,mc,j;

char t;

printf("\t\t\tBatting Avg\n\t\t\t======= ===\n\tInput\n\t=====\n");

printf("\t\tEnter a player count :");

scanf("%d",&np);

printf("\t\tEnter a match count :");

scanf("%d",&mc);

for(i=0;i<np;i++)

{

printf("\t\tEnter %d player name :",i+1);

scanf("%s",v[i].n);

scanf("%c",&t);

v[i].d.t=0;

for(j=0;j<mc;j++)

{

printf("\t\tEnter %d player %d match score :",i+1,j+1);

scanf("%d",&v[i].d.m[j]);

v[i].d.t+=v[i].d.m[j];

}

v[i].d.a=v[i].d.t/3.0;

}

printf("\toutput\n\t======\n\t\t\tScore borde\n\t\t\t===== =====\n");

printf("\t\tName\t");

for(j=0;j<mc;j++)

{

printf("Match%d\t",j+1);

}

printf("Total\tAvg\t\n");

for(i=0;i<np;i++)

{

printf("\t\t%s\t",v[i].n);

for(j=0;j<mc;j++)

{

printf("%d\t",v[i].d.m[j]);

}

printf("%d\t%.2f\n",v[i].d.t,v[i].d.a);

}

}

#include <stdio.h>

struct Complex

{

float r;

float i;

};

struct Complex addComplex(struct Complex a, struct Complex b) {

struct Complex result;

result.r = a.r + b.r;

result.i = a.i + b.i;

return result;

}

struct Complex subComplex(struct Complex a, struct Complex b)

{

struct Complex result;

result.r = a.r - b.r;

result.i = a.i - b.i;

return result;

}

main()

{

struct Complex num1, num2, result;

int choice;

printf("\t\t\tcoplex\n\t\t\t======\n\tInput\n\t=====\n");

printf("\t\tEnter real part of first complex number: ");

scanf(" %f", &num1.r);

printf("\t\tEnter image part of first complex number:");

scanf("%f", &num1.i);

printf("\t\tEnter real part of second complex number: ");

scanf(" %f", &num2.r);

printf("\t\tEnter image part of second complex number: ");

scanf("%f", &num2.i);

printf("\t\t1. Add\n\t\t2. Subtract\n\t\tEnter your choice: ");

scanf("%d", &choice);

printf("\toutput\n\t======\n");

switch(choice)

{

case 1:

result = addComplex(num1, num2);

printf("\t\tAddition = %.2f + %.2fi", result.r, result.i);

break;

case 2:

result = subComplex(num1, num2);

printf("\t\tSubtraction = %.2f + (%.2fi)", result.r, result.i);

break;

default:

printf("\t\tInvalid Choice!");

}

}