Program to read data/character from opened file.

using codeblocks
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//using getc() to read (one character)that data from an opened
 #include <stdio.h>
int main()
{
    FILE *p;                               //pointer declaration
    char ch;
    printf("now we are going to read that stored data\n");
    p=fopen("data.txt","r");           // openes the file in read only mode. We should know the file name.
    while((ch=getc(p))!=EOF)               //read a character using getc from opened file.
    {
        putchar(ch);                      //prints that character on screen
    }
    fclose(p);                            //closes the file
    return 0;
}
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using turboc++
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//using getc() to read (one character)that data from an opened
 #include <stdio.h>
#include<conio.h>
int main()
{
    FILE *p;                               //pointer declaration
    char ch;
    printf("now we are going to read that stored data\n");
    p=fopen("data.txt","r");           // openes the file in read only mode. We should know the file name.
    while((ch=getc(p))!=EOF)               //read a character using getc from opened file.
    {
        putchar(ch);                      //prints that character on screen
    }
    fclose(p);                            //closes the file
getch();
    return 0;
}

Program to store data/character in a datafile

using codeblocks

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//using putc() to store data(one character) and getc() to read (one character)that data from an opened file

#include <stdio.h>

int main()

{

    FILE *p;                               //pointer declaration

    char ch;

    p=fopen("data.txt","w");               //file opening in write mode

    printf("first we store/write data in an opened file\n");

    printf("press ctrl+z to exit\n");

    while((ch=getchar())!=EOF)              //gets one character until you press ctrl+z/terminate the input

    {

        putc(ch,p);                        // write the entered character in that file of pointer 'p'.

    }

    fclose(p);                              //closes the file

  }

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using turbo c++

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//using putc() to store data(one character) and getc() to read (one character)that data from an opened file

#include <stdio.h>

#include<conio.h>

int main()

{

    FILE *p;                               //pointer declaration

    char ch;

    p=fopen("data.txt","w");               //file opening in write mode

    printf("first we store/write data in an opened file\n");

    printf("press ctrl+z to exit\n");

    while((ch=getchar())!=EOF)              //gets one character until you press ctrl+z/terminate the input

    {

        putc(ch,p);                        // write the entered character in that file of pointer 'p'.

    }

    fclose(p);                              //closes the file

getch();

  }

program to find sum of two distances measured in feet and inch using function and typedef.

using codeblocks
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//using typedef and function to print sum of two feet and inches
#include <stdio.h>
 typedef struct               //creating a new tag called feet_inch and supplying struct property to it.
{
    int feet1,feet2;          //members
    int inch1,inch2;
    int total_feet,total_inch;
}feet_inch;                  //works like tag; but is a variable
void sum( feet_inch var, feet_inch var1);   //function prototype.
int main()
{
    feet_inch var, var1;       // creating two variables
    printf("enter first feet and inch\n");
    scanf("%d%d",&var.feet1,&var.inch1);//gets input
    printf("enter second feet and inch\n");
    scanf("%d%d",&var1.feet2,&var1.inch2);//gets input
    sum(var,var1);                         //calling with parameter var and var1
    return 0;
}
void sum( feet_inch var,feet_inch var1)
{
 feet_inch total;                          // creating third variable to store total
total.total_feet=var.feet1+var1.feet2+(var.inch1+var1.inch2)/12;//finds total feet
total.total_inch=(var.inch1+var1.inch2)%12;                //finds total inch
printf("total feet=%d and total inch=%d\n",total.total_feet,total.total_inch);//prints output
}

//note: Let's not declare function at the top like we do in functions. If it is then it would not work.
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using turboc++
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//using typedef and function to print sum of two feet and inches
#include <stdio.h>
#include<conio.h>
 typedef struct               //creating a new tag called feet_inch and supplying struct property to it.
{
    int feet1,feet2;          //members
    int inch1,inch2;
    int total_feet,total_inch;
}feet_inch;                  //works like tag; but is a variable
void sum( feet_inch var, feet_inch var1);   //function prototype.
int main()
{
    feet_inch var, var1;       // creating two variables
    printf("enter first feet and inch\n");
    scanf("%d%d",&var.feet1,&var.inch1);//gets input
    printf("enter second feet and inch\n");
    scanf("%d%d",&var1.feet2,&var1.inch2);//gets input
    sum(var,var1);                         //calling with parameter var and var1
   getch();
    return 0;
}
void sum( feet_inch var,feet_inch var1)
{
 feet_inch total;                          // creating third variable to store total
total.total_feet=var.feet1+var1.feet2+(var.inch1+var1.inch2)/12;//finds total feet
total.total_inch=(var.inch1+var1.inch2)%12;                //finds total inch
printf("total feet=%d and total inch=%d\n",total.total_feet,total.total_inch);//prints output
}

//note: Let's not declare function at the top like we do in functions. If it is then it would not work.

program to understand typedef

using codeblocks
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//understanding typedef
#include <stdio.h>
int main()
{
    typedef int second_type;// creates another data type named second_type. It gets all property of 'int'
    second_type a,b,c;      // second_type is working as integer data type.
    printf("enter a,b,and c\n");
    scanf("%d%d%d",&a,&b,&c);  //gets input
    printf("a=%d,b=%d and c=%d",a,b,c);//prints output
    return 0;
}

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using turboc++
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//understanding typedef
#include <stdio.h>
#include<conio.h>
int main()
{
    typedef int second_type;// creates another data type named second_type. It gets all property of 'int'
    second_type a,b,c;      // second_type is working as integer data type.
    printf("enter a,b,and c\n");
    scanf("%d%d%d",&a,&b,&c);  //gets input
    printf("a=%d,b=%d and c=%d",a,b,c);//prints output
   getch(); 
  return 0;
}

Program to understand typedef for struct.

using codeblocks
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//understanding typedef with struct
#include <stdio.h>
typedef struct                   // typedef for struct to assign its property to access
{
    char name[40];              //members
    char add[40];
    int roll;
}access;                         // it is being tag (struct). It has got all property of struct
    access first;                 //variable of tag access. we can also put inside main function.
int main()
{
    printf("enter name\n");
    gets(first.name);            //gets input
    printf("enter add\n");
    gets(first.add);
    printf("enter roll\n");
    scanf("%d",&first.roll);
    printf("name=%s , address=%s and roll=%d\n",first.name,first.add,first.roll);//displays output.
    return 0;
}

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Or

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//understanding typedef with struct
#include <stdio.h>
typedef struct   tag                // typedef for struct to assign its property to access via 'tag'
{
    char name[40];              //members
    char add[40];
    int roll;
}access;                         // it is being tag (struct). It has got all property of struct
    access first;                 //variable of tag access. we can also put inside main function.
int main()
{
    printf("enter name\n");
    gets(first.name);            //gets input
    printf("enter add\n");
    gets(first.add);
    printf("enter roll\n");
    scanf("%d",&first.roll);
    printf("name=%s , address=%s and roll=%d\n",first.name,first.add,first.roll);//displays output.
    return 0;
}

//note: putting a tag doesnot make any different. We have to use same method as given in above //example.
//Mostly, the tag is unimportant.

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using turboC++
-------------------------------------------------------------------------

//understanding typedef with struct
#include <stdio.h>
#include<conio.h>
typedef struct                   // typedef for struct to assign its property to access
{
    char name[40];              //members
    char add[40];
    int roll;
}access;                         // it is being tag (struct). It has got all property of struct
    access first;                 //variable of tag access. we can also put inside main function.
int main()
{
    printf("enter name\n");
    gets(first.name);            //gets input
    printf("enter add\n");
    gets(first.add);
    printf("enter roll\n");
    scanf("%d",&first.roll);
    printf("name=%s , address=%s and roll=%d\n",first.name,first.add,first.roll);//displays output.
    getch();
    return 0;
}

program to copy a string to another using pointer passed to function

using codeblocks
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//program to copy a string to another using pointer passed to function// program title
#include <stdio.h>                   //header file
#include <string.h>                   // header file to handle string
void string_length(char [],char[]);    // function prototype with character array
int main()
{
    char string[50],string1[50];            // character string
    puts("enter string1 and string2\n");
    gets(string);              //gets string
    gets(string1);
    string_length(string,string1);     //calling of function with string as parameter
                               // here, string is passed  as reference to formal parameter
    return 0;
}
void string_length(char *strings,char *strings1)// this accepts string with address from main function
{
     puts(strings);
     puts(strings1);
     printf("after copying\n");
     strcpy(strings,strings1);        // copies string
     puts(strings);          //displays string
}
//note: we can also use char string[] with void string_length in body line. It works.
//once you try.It runs.
//but we can not pass string as pointer in prototype.
// i.e. void string_length(char *[]);

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using turboc++

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//program to copy a string to another using pointer passed to function// program title

#include <stdio.h>                   //header file

#include <string.h>                   // header file to handle string

#include<conio.h>

void string_length(char [],char[]);    // function prototype with character array

int main()

{

    char string[50],string1[50];            // character string

    puts("enter string1 and string2\n");

    gets(string);              //gets string

    gets(string1);

    string_length(string,string1);     //calling of function with string as parameter

                               // here, string is passed  as reference to formal parameter

getch();    

return 0;

}

void string_length(char *strings,char *strings1)// this accepts string with address from main function

{

     puts(strings);

     puts(strings1);

     printf("after copying\n");

     strcpy(strings,strings1);        // copies string

     puts(strings);          //displays string

}

//note: we can also use char string[] with void string_length in body line. It works.

//once you try.It runs.

//but we can not pass string as pointer in prototype.

// i.e. void string_length(char *[]);

program to reverse a string using pointer. Pass pointer to function.

using codeblocks
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//program to find reverse of string using pointer passed to function// program title
#include <stdio.h>                   //header file
#include <string.h>                   // header file to handle string
void string_length(char []);    // function prototype with character array
int main()
{
    char string[50];            // character string
    puts("enter string\n");
    gets(string);              //gets string
    string_length(string);     //calling of function with string as parameter
                               // here, string is passed  as reference to formal parameter
    return 0;
}
void string_length(char *strings)// this accepts string with address
{
     strrev(strings);        // supplies length
     puts(strings);          //displays string
}
//note: we can also use char string[] with void string_length in body line. It works.
//once you try.It runs.
//but we can not pass string as pointer in prototype.
// i.e. void string_length(char *[]);

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using turboC++

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//program to find reverse of string using pointer passed to function// program title

#include <stdio.h>                   //header file

#include <string.h>                   // header file to handle string

#include<conio.h>

void string_length(char []);    // function prototype with character array

int main()

{

    char string[50];            // character string

    puts("enter string\n");

    gets(string);              //gets string

    string_length(string);     //calling of function with string as parameter

                               // here, string is passed  as reference to formal parameter

   getch();

    return 0;

}

void string_length(char *strings)// this accepts string with address

{

     strrev(strings);        // supplies length

     puts(strings);          //displays string

}

//note: we can also use char string[] with void string_length in body line. It works.

//once you try.It runs.

//but we can not pass string as pointer in prototype.

// i.e. void string_length(char *[]);