pointer

w3resource/pointers/e1-1.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main(void) {
+  int m = 10;
+  int *z = &m;
+  int n, o;
+  
+    printf("\n\n Pointer : Show the basic declaration of pointer :\n");
+    printf("-------------------------------------------------------\n");
+    printf(" Here is m=10, n and o are two integer variable and *z is an integer");
+    printf("\n\n z stores the address of m  = %p\n", z); // Printing the address stored in z using %p
+    printf("\n *z stores the value of m = %i\n", *z); // Printing the value pointed to by z using *z
+    printf("\n &m is the address of m = %p\n", &m); // Printing the address of m using &m
+    printf("\n &n stores the address of n = %p\n", &n); // Printing the address of n using &n
+    printf("\n &o  stores the address of o = %p\n", &o); // Printing the address of o using &o
+    printf("\n &z stores the address of z = %p\n\n", &z); // Printing the address of z using &z
+
+  return 0;
+}

w3resource/pointers/e1-2.c

@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+int main(void) {
+  int m = 29;
+  int *ab = &m;
+  printf("m: %d, *ab: %d, ab: %d, address m: %d\n", m, *ab, ab, &m);
+  m = 32;
+  printf("m: %d, *ab: %d, ab: %d, address m: %d\n", m, *ab, ab, &m);
+  *ab = 7;
+  printf("m: %d, *ab: %d, ab: %d, address m: %d\n", m, *ab, ab, &m);
+
+  return 0;
+}

w3resource/pointers/e1-3.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main(void) {
+  int m = 300;
+  float fx = 300.600006;
+  char cht = 'z';
+
+  int *p1 = &m;
+  float *p2 = &fx;
+  char *p3 = &cht;
+
+  printf("The & operator: m=%p, fx=%p, cht=%p\n", &m, &fx, &cht);
+  printf("The & and * operator: m=%d, fx=%f, cht=%c\n", *(&m), *(&fx), *(&cht));
+  printf("Using only pointer variable: m=%p, fx=%p, cht=%p\n", p1, p2, p3);
+  printf("Using only pointer operator: m=%d, fx=%f, cht=%c\n", *p1, *p2, *p3);
+
+
+  return 0;
+}

w3resource/pointers/e1-4.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+int main(void) {
+  puts("Num adder with pointer!");
+  int num1, num2;
+  int *p1 = &num1;
+  int *p2 = &num2;
+  puts("Enter p1 and p2!");
+  scanf("%d", &num1);
+  scanf("%d", &num2);
+  printf("Total:%d\n", (*p1) + (*p2));
+
+  return 0;
+}

w3resource/pointers/e1-5.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+
+void sumOfNums(int *num1, int *num2);
+
+int main(void)
+{
+  
+  int num1, num2;
+  puts("Enter num1 and num2");
+  scanf("%d %d", &num1, &num2);
+
+  int *p1 = &num1;
+  int *p2 = &num2;
+
+  sumOfNums(p1, p2);
+
+
+
+  return 0;
+}
+
+void sumOfNums(int *num1, int *num2) {
+  printf("Sum of Nums: %d\n", (*num1) + (*num2));
+}

w3resource/pointers/e1-6.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main(void)
+{
+  int num1, num2;
+  int *p1 = &num1;
+  int *p2 = &num2;
+  puts("Enter nums!");
+  scanf("%d %d", p1, p2);
+  (*p1 > *p2) ? printf("%d > %d", *p1, *p2) : printf("%d <= %d", *p1, *p2); 
+  return 0;
+}

w3resource/pointers/e1-7.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main(void)
+{
+  puts("Input the number of elements to store in the array: ");
+  int arr = 0;
+  scanf("%d", &arr);
+  int nums[arr] = {};
+
+  for(size_t j = 0; j < arr; j++) {
+    printf("For Element %d enter num!\n", j);
+    int num = 0;
+    scanf("%d", &num);
+    nums[j] = num;
+  }
+  
+  for(size_t j = 0; j < arr; j++) {
+    printf("Element %d = %d\n", j, nums[j]);
+  }
+  return 0;
+}