C Example for Beginners: C Program to Display its own Source Code as Output

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(C programming Example for Beginners)

C Program to Display its own Source Code as Output

In this example, you’ll learn to display source of the program using __FILE__ macro.


Though this problem seems complex, the concept behind this program is straightforward; display the content from the same file you are writing the source code.

Procedure to display its own source code in C programming
#include <stdio.h>
int main() {

   // location the current input file.
   printf("%s",__FILE__);
}

C program to display its own source code


#include <stdio.h>
int main(){
    FILE *fp;
    int c;
   
    // open the current input file
    fp = fopen(__FILE__,"r");

    do {
         c = getc(fp);   // read character 
         putchar(c);     // display character
    }
    while(c != EOF);  // loop until the end of file is reached
    
    fclose(fp);
    return 0;
}

 

 

C Example for Beginners: C Program to Display its own Source Code as Output

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