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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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Reading From a File in C-Language



In this C program we will Read the content of a text-file(.txt) by printing the content of the text-file(.txt)in the screen.

input:

NULL.

output:

The content of the text-file(.txt) will be printed on the screen and then we can read the content.

CODE---->


#include<stdio.h>
#include<stdlib.h>
int main()
{
 FILE *fp;
 char ch;
 fp=fopen("hello.txt", "r");
 if(fp==NULL)
 {
  printf("  Unable to open File.");
 }
 else
 {
  ch=fgetc(fp);
  while(ch!=EOF)
  {
   printf("%c",ch);
   ch=fgetc(fp);
  }
 }
 fclose(fp);
 return 0;
}

N.B. : In this C-Program the used text-file(.txt) and the C-Program file was stored in the same directory or path. So, if you want to open the text-file(.txt) stored in any other directory, path or folder, then, you have to declare the whole path or directory in the program.(i.e : fp=fopen("C:\\Users\\ADMIN\Desktop\\...the directory...\\file_name.txt")). The directory of a text-file(.txt) can be found by it's Property
Don't just read, write it, run it.....

RESULT:


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