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C Program to Display its own Source Code as Output

C Program to Display its own Source Code as Output

To understand this example, you should have knowledge of following C programming topics:
Though this problem seems complex but, the concept behind this program is very simple; display the content from the same file you are writing the source code.
Procedure to display its own source code in C programming
A predefined macro __FILE__ contains the location of a C programming file, it is working on. For example:
#include <stdio.h>
int main(){
   printf("%s",__FILE__);
}
The output of this program is the location of this C programming file.

C program to display its own source code using __FILE__

#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;
}
This program displays the content of this particular C programming file(source code) because __FILE__ contains the location of this C programming file in a string.

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Select
01-Select All
Given a City table, whose fields are described as +-------------+----------+ | Field       | Type     | +-------------+----------+ | ID          | int(11)  | | Name        | char(35) | | CountryCode | char(3)  | | District    | char(20) | | Population  | int(11)  | +-------------+----------+
write a query that will fetch all columns for every row in the table.

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