Command Line Argument

C language is known as a language of building block of function. It means all the things achieved by the language using function.

A function is a set of some valid statements of language. Which achieved some specific task? You need to know some information about function before using it.

• Function name
• Return type

Print Some Character from a File

Q : Write a ‘C’ program to print only first 12 characters including blank space from file test.txt.
Solution :

#include<stdio.h>

#include<conio.h>

void main()

{

     FILE *pt;

     int i;

     char ch;

     pt=fopen("test.txt","r");

     if(pt==NULL)

Structure size without sizeof operator

Q : Write a ‘C’ program to find size of structure without using sizeof operator.

Solution :

#include<stdio.h>

typedef struct stu

{

     int roll;

     char name[20];

Write A Line to File

Q: Write a ‘C’ program to write a line of string at a text file.

Solution : 

#include<stdio.h>

void main()

{

     FILE *pt;

     char ar[100];

     int i;

     printf("Enter the Text>> ");

     gets(ar);

     pt=fopen("test.txt","w");

     if(pt==NULL)

          puts("Unable to open file");

     else

     {

          for(i=0;ar[i]!='\0';i++)

               putc(ar[i],pt);

     }

     printf("\nData created successfully");

     fclose(pt);

    

}

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