How to display same source code as output in c programming?

December 26, 2024 1 Comment » Hits : 223



Program :

#include<stdio.h>
int main(){
    FILE *fp;
    char c;
    fp = fopen(__FILE__,"r");
    do{
         c= getc(fp);
         putchar(c);
    }
    while(c!=EOF);
    fclose(fp);
    return 0;
}

Output :

#include<stdio.h>
int main(){
    FILE *fp;
    char c;
    fp = fopen(__FILE__,"r");
    do{
         c= getc(fp);
         putchar(c);
    }
    while(c!=EOF);
    fclose(fp);
    return 0;
}

Explanation :

fp = fopen(__FILE__,"r");
  • __FILE__ is Standard Predefined Macros in C Programming.
  • This macro will expand to the name of current file path.
  • Suppose we have saved this source code at path -
c://tc/bin/file1.c

then

fp = fopen(__FILE__,"r");

will be expanded as -

fp = fopen("c://tc/bin/file1.c","r");

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My name is Pritesh Taral. I am working in well known MNC. as Java Developer. I am part time blogger loves writing articles on C/C++. I am active on facebook using community fan page .One can Visit me @ Facebook Facebook Fan Page
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