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The static Storage Class

#include <stdio.h> /* function declaration */ void func(void); static int count = 5; /* global variable */ main() {    while(count--) {       func();    }    return 0; } /* function definition */ void func( void ) {    static int i = 5; /* local static variable */    i++;    printf("i is %d and count is %d\n", i, count); } output is i is 6 and count is 4 i is 7 and count is 3 i is 8 and count is 2 i is 9 and count is 1 i is 10 and count is 0
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Variable Declaration in C

#include <stdio.h> // Variable declaration: extern int a, b; extern int c; extern float f; int main () {    /* variable definition: */    int a, b;    int c;    float f;    /* actual initialization */    a = 10;    b = 20;      c = a + b;    printf("value of c : %d \n", c);    f = 70.0/3.0;    printf("value of f : %f \n", f);    return 0; } output is value of c : 30 value of f : 23.333334
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Structures as Function Arguments

#include <stdio.h> #include <string.h> struct Books {    char  title[50];    char  author[50];    char  subject[100];    int   book_id; }; /* function declaration */ void printBook( struct Books book ); int main( ) {    struct Books Book1;        /* Declare Book1 of type Book */    struct Books Book2;        /* Declare Book2 of type Book */    /* book 1 specification */    strcpy( Book1.title, "C Programming");    strcpy( Book1.author, "ramratan bissoo");    strcpy( Book1.subject, "C Programming Tutorial");    Book1.book_id = 654123;    /* book 2 specification */    strcpy( Book2.title, "Miracle Billing");    strcpy( Book2.author, "DEEPAK SHARMA");    strcpy( Book2.subject, "Miracle Billing Tutorial");    Book2.book_id = 420420; ...
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