#include stdio.h/* global variable declaration */int a = 20;int main () {/* local variable declaration in main function */

#include stdio.h/* global variable declaration */int g;int main () {/* local variable declaration */

#include stdio.hint main () {/* local variable declaration */int a, b;int c;/* actual initialization */

#include stdio.hint main () {intvar = 20;/* actual variable declaration */int*ip;/* pointer variable declaration */

#include stdio.hint main () {intvar1;char var2[10];printf(Address of var1 variable: %x\\n, var1);

#include stdio.hint main () {/* an array with 5 elements */double balance[5] = {1000.0, 2.0, 3.4, 17.0, 50.0};

#include stdio.hint main () {/* an array with 5 rows and 2 columns*/int a[5][2] = { {0,0}, {1,2}, {2,4}, {3,6},{4,8}};

#include stdio.hconst int MAX = 3;int main () {intvar[] = {10, 100, 200};inti, *ptr;/* let us have address of the first element in pointer */

#include stdio.hconst int MAX = 3;int main () {intvar[] = {10, 100, 200};inti, *ptr;/* let us have array address in pointer */

// C语言NULL指针 // C语言NULL指针 --------------------#include stdio.hint main () {int*ptr = NULL;

#include stdio.h#include string.hstruct Books {chartitle[50];charauthor[50];charsubject[100];

#include stdio.hmain() {int a = 21;int b = 10;int c ;c = a + b;printf(Line 1 - Value of c is %d\\n, c );

#include stdio.hmain() {int a = 5;int b = 20;int c ;if ( a b ) {printf(Line 1 - Condition is true\\n );

#include stdio.h// C语言while循环int main () {/* local variable definition */int a = 10;/* while loop execution */

#include stdio.h// C语言for循环 int main () {int a;/* for loop execution */for( a = 10; a 20; a = a + 1 ){

#include stdio.hmain() {int a = 21;int c ;c =a;printf(Line 1 - =Operator Example, Value of c = %d\\n, c );

#include stdio.hmain() {unsigned int a = 60;/* 60 = 0011 1100 */unsigned int b = 13;/* 13 = 0000 1101 */

#include stdio.hint main () {/* local variable definition */int a = 100;/* check the boolean condition */

#include stdio.hint main () {/* local variable definition */char grade = B;switch(grade) {

#include stdio.hint main () {/* local variable definition */int a = 100;int b = 200;switch(a) {