Printing message at same position on Screen
This C program will print message on same position on screen without Graphics library.
#include<stdio.h>
#include<windows.h>
int main(){
int i;
for(i=0; i<=100; i++)
{
system("cls");
printf("Software Installation %d %% completed", i);
Sleep(10);
}
getch();
return 0;
}
Output of program:
Software Installation 100 % completed
Note: This program prints "Software Installation %age [1 to 100] completed" message at same position on screen.
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File Management using C Structure
This C Program will write a student data into a file using the Structure and File Management concept of C programming.
Source Code
#include <stdio.h>
//Structure to store student data.
struct student
{
char fname[30];
char lname[30];
int rollno;
float percentage;
};
void main ()
{
FILE *fp;
//declare structure(student) variable
struct student input;
// open student file for writing
fp = fopen ("student.dat","w");
if (fp == NULL){
printf("\nFile opening error..\n\n");
exit (1);
}
printf("Enter \"exit\" as First Name to stop reading user input.");
while (1)
{
printf("\nFirst Name: ");
scanf ("%s", input.fname);
if (strcmp(input.fname, "exit") == 0)
exit(1);
printf("Last Name : ");
scanf ("%s", input.lname);
printf("Roll Number : ");
scanf ("%d", &input.rollno);
printf("Percentage : ");
scanf ("%f", &input.percentage);
// write student data to student.dat file
fwrite (&input, sizeof(struct student), 1, fp);
}
}
Output of program
Enter "exit" as First Name to stop reading user input.
First Name: K
Last Name : Patel
Roll Number : 101
Percentage : 90.50
First Name: ABC
Last Name : Shah
Roll Number : 102
Percentage : 95.50
First Name: exit
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