C Data file pro

Write on the Data File

#include

#include

struct student

{

   int roll;

   char name[12];

   int percent;

 }

 s1 = { 10, "SMJC", 80 };

 int main()

 {

   FILE *fp;

   struct student s2;

   fp = fopen("ip.txt", "w");

   fwrite(&s1, sizeof(s1), 1, fp);

   fclose(fp);

   fp = fopen("ip.txt", "r");

   fread(&s2, sizeof(s2), 1, fp);

   fclose(fp); 

   printf("\nRoll : %d", s2.roll);

   printf("\nName : %s", s2.name);

   printf("\nPercent : %d", s2.percent);

   return (0);

}

Output

Roll    : 10

Name    : SMJC

Percent : 80

C Program to Display same Source Code as Output

#include

#include

int main()

          {

FILE *fp;

   char ch;

   fp = fopen(__FILE__, "r");

   do

     {

      ch = getc(fp);

      putchar(ch);

      }

      while (ch != EOF);

      fclose(fp);

      return 0;

}

Output

#include

#include 

int main()

{

   FILE *fp;

   char ch;

   fp = fopen(__FILE__, "r");

   do {

      ch = getc(fp);

      putchar(ch);

   } while (ch != EOF);

    fclose(fp);

   return 0;

}

C program to convert the file contents in Upper-case & Write Contents in a output file

#include

#include

void main()

{

FILE*fp1,*fp2;

char a;

clrscr();

fp1=fopen("test1.txt","w");

if(fp2==NULL)

{

puts("Not able to open this file");

fclose(fp1);

exit(1);

}

do

{

a=fgetc(fp1);

a=toupper(a);

fputc(a,fp2);

}

while(a!=EOF);

fcloseall();

getch();

}

Drawing Line in Graphics Mode Using Graphics Function

#include

#include

#include 

int main(void)

  {

   int gdriver = DETECT, gmode;

   int x1 = 200, y1 = 200;

   int x2 = 300, y2 = 300;

   initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

   line(x1, y1, x2, y2);

   closegraph();

}

C Program to draw Inductive Coil using Graphical Function

#include

#include

#include

void main()

{

   int gd = DETECT, gm;

   initgraph(&gd, &gm, "c:\\tc\\bgi");

   line(100, 200, 150, 200);

   arc(200, 200, 0, 180, 50);

   arc(260, 200, 0, 180, 50);

   arc(230, 200, 180, 360, 20);

   arc(320, 200, 0, 180, 50);

   arc(290, 200, 180, 360, 20);

   arc(380, 200, 0, 180, 50);

   arc(350, 200, 180, 360, 20);

   line(430, 200, 470, 200);

   getch();

   closegraph();

}

C Program to Draw Resistance using Graphics Function

#include

#include

#include

 void main()

 {

   int gd = DETECT, gm;

   initgraph(&gd, &gm, "c:\\tc\\bgi");

   line(90, 100, 100, 100);

   line(100, 100, 110, 120);

   line(110, 120, 120, 100);

   line(120, 100, 130, 120);

   line(130, 120, 140, 100);

   line(140, 100, 150, 120);

   line(150, 120, 160, 100);

   line(160, 100, 170, 100);

   outtextxy(100, 130, "Resisitor");

    getch();

   closegraph();

}

C Program to Draw PNP Transistor using Graphics Function

#include

#include

#include

void main()

{

   int gd = DETECT, gm;

   initgraph(&gd, &gm, "c:\\tc\\bgi");

   line(100, 100, 100, 200);

   line(70, 150, 100, 150);

   line(100, 125, 150, 90);

   line(100, 175, 150, 210);

   line(100, 175, 110, 200);

   line(100, 175, 125, 175);

   outtextxy(200, 150, "PNP Transistor");

   getch();

   closegraph();

}