C (assign- 20-25) 🎆

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Q20. 

//value

#include <stdio.h>

void swap(int, int);

void main()

{

    int n1, n2;

    printf("Enter the two numbers to be swapped\n");

    scanf("%d%d", &n1, &n2);

    printf("\nBefore Swap n1=%d n2=%d", n1, n2);

    swap(n1, n2);

}

void swap(int n1, int n2)

{

    int temp;

    temp = n1;

    n1 = n2;

    n2 = temp;

    printf("\nAfter Swap n1=%d n2=%d", n1, n2);

}

// ref..

#include <stdio.h>

void swap1(int *num1, int *num2);

int main()

{

    int num1, num2;

    printf("Enter two numbers: ");

    scanf("%d%d", &num1, &num2);

 

    printf("\nBefore swap of num1 = %d num2 = %d \n", num1, num2);

    swap1(&num1, &num2);

    return 0;

}

void swap1(int *num1, int *num2)

{

    int temp;

    temp = *num1;

    *num1 = *num2;

    *num2 = temp;

    printf("\nAfter Swap of num1 = %d num2 = %d", *num1, *num2);

}

Q.21

#include <stdio.h>

void main()

{

    int arr1[20];

    int i, n, sum = 0;

    int *pt;

    printf(" Input the number of elements to store in the array (max 20) : ");

    scanf("%d", &n);

    printf(" Input %d number of elements in the array : \n", n);

    for (i = 0; i < n; i++)

    {

        printf(" element - %d : ", i + 1);

        scanf("%d", &arr1[i]);

    }

    pt = arr1;

    for (i = 0; i < n; i++)

    {

        sum = sum + *pt;

        pt++;

    }

    printf(" The sum of array is : %d\n\n", sum);

}

Q22.

// 22. Design a structure student to contain name, roll no,

// total marks obtained.Write a program to print percentage along with the information.

#include <stdio.h>

#include <stdlib.h>

struct student

{

    char name[20];

    int roll_no;

    float per;

    int physics, chem, maths, com, eng, total;

};

void main()

{

    struct student s[10], temp;

    int n, i, j;

    printf("Enter the number of students :");

    scanf("%d", &n);

    for (i = 1; i <= n; i++)

    {

        printf("Enter the student's name, roll number and marks in five subjects: ");

        scanf("%s %d %d %d %d %d %d", s[i].name, &s[i].roll_no, &s[i].physics, &s[i].chem, &s[i].com, &s[i].eng, &s[i].maths);

        s[i].total = s[i].physics + s[i].chem + s[i].maths;

        s[i].per = ((s[i].total * 100) / 500);

    }

    printf("\nName\tRollNo\tPhysics\tChem\tMaths\tComputer\tEnglish\t\tTotal\tPercentage  \n");

    for (i = 1; i <= n; i++)

    {

        printf("%s\t%d\t%d\t%d\t%d\t%d\t\t%d\t\t%d\t%f\n", s[i].name, s[i].roll_no, s[i].physics, s[i].chem, s[i].maths, s[i].com, s[i].eng, s[i].total, s[i].per);

    }

}

Q23.

// Design a union employee to contain emp_name, deptment, designation and salary.Write a program to print employee information.

#include <stdio.h>

#include <stdlib.h>

union employe

{

    char name[20];

    char department[1];

    char designation[1];

    float salary;

};

void main()

{

    union employe s;

    printf("\nEnter the employe's name ");

    scanf("%s", s.name);

    printf("the employe's name is : %s\n\n", s.name);

    printf("Enter the department ");

    scanf("%s", s.department);

    printf("the department is: %s \n\n", s.department);

    printf("Enter the designation ");

    scanf("%s", s.designation);

    printf("the designation is : %s \n\n", s.designation);

    printf("Enter the salary : ");

    scanf("%f", &s.salary);

    printf("the salary is : %f ", s.salary);

   

}

24. 

 problem solved 😶‍🌫️

// Write a program to open a file employee and store the following information in it.

// a.Emp_id

//     b.Emp_name

//         c.Department

//             d.Salary

#include <stdio.h>

#include <stdlib.h>

int main()

{

    char name[20];

    char department[10];

    char designation[10];

    float salary;

    FILE *ptr;

    ptr = fopen("employ.txt", "w");

    printf("\nEnter the employe's name ");

    scanf("%s", name);

    printf("Enter the department ");

    scanf("%s", department);

    printf("Enter the designation ");

    scanf("%s", designation);

    printf("Enter the salary : ");

    scanf("%f", &salary);

    fprintf(ptr, "Name: %s\t department: %s \tdesignation :%s \t salary: %f \n", name, department, designation, salary);

    fclose(ptr);

    return 0;

}

Q25.

problem solved😶‍🌫️

// Write a program to open a file book and store the following information in it

//.a.title

//     b.author

//         c.pages

//             d.prize

#include <stdio.h>

#include <stdlib.h>

int main()

{

    char title[20];

    char author[15];

    int pages;

    float price;

    FILE *ptr;

    ptr = fopen("book.txt", "w");

    printf("\nEnter the title ");

    scanf("%s", title);

    printf("Enter the author ");

    scanf("%s", author);

    printf("Enter the pages ");

    scanf("%d", &pages);

    printf("Enter the price: ");

    scanf("%f", &price);

    fprintf(ptr, "Title: %s\t Author: %s \tpages:%d\tprice: %f \n", title, author, pages, price);

    fclose(ptr);

    return 0;

}