BIKESH SUNAR

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A datafile “patient.txt” contain name, disease , age and bed number of few patients. Write a C program to read and display only records of patients suffering from “COVID”.

A datafile “patient.txt” contain name, disease , age and bed number of few patient. Write a C program to read and display records of all patients in appropriate format.

Write a C program to enter name, roll number and percentage of 10 students and store them in a data file [use any name].

#include <stdio.h>

struct student {

char name[50];

int rollno;

float percentage;

};

int main() {

struct student s[10];

int i;

printf("Enter details of 10 students:\n");

for (i = 0; i < 10; i++) {

printf("\nStudent %d:\n", i+1);

printf("Name: ");

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

printf("Roll Number: ");

scanf("%d", &s[i].rollno);

printf("Percentage: ");

scanf("%f", &s[i].percentage);

}

// Open the file for writing

FILE *fp;

fp = fopen("students.dat",...

Write a C program to read two 3x3 matrices and perform matrix addition/multiplication.

#include <stdio.h>

int main()

{

int a[3][3], b[3][3], c[3][3];

int i, j, k, choice;

printf("Enter the elements of first matrix:\n");

for (i = 0; i < 3; i++) {

for (j = 0; j < 3; j++) {

scanf("%d", &a[i][j]);

}

printf("Enter the elements of second matrix:\n");

for (i = 0; i < 3; i++) {

for (j = 0; j < 3; j++) {

scanf("%d", &b[i][j]);

}

printf("Enter your choice:\n");

printf("1. Addition\n");

printf("2. Multiplication\n");

...

Write a C program to read salary of 300 employees and count the number of employee getting salary between 30000 to 50000.

Write a C program to arrange 10 numbers in ascending order.

#include <stdio.h>

int main() {

int a[10], i, j, temp;

printf("Enter 10 numbers:\n");

for (i = 0; i < 10; i++) {

scanf("%d", &a[i]);

}

for (i = 0; i < 9; i++) {

for (j = i+1; j < 10; j++) {

if (a[i] > a[j]) {

temp = a[i];

arr[i] = a[j];

a[j] = temp;

}

printf("Numbers in ascending order:\n");

for (i = 0; i < 10; i++) {

printf("%d ", a[i]);

}

return 0;

}

Write a C program to calculate factorial of a given number using recursive function.

OUPUT:

Enter any number 6

factorial is 720

PROGRAMS:

#include<stdio.h>

int fact (int);

int main()

{

int n,f;

printf("Enter any number ");

scanf("%d",&n);

f = fact(n);

printf("factorial is %d",f);

return 0;

}

int fact (int n)

{

if (n<=1)

return 1;

else

return (n*fact(n-1));

}