fix struct to use pointer

Author: scivision

src/c/my_struct.h

@@ -11,7 +11,7 @@ struct params {
   char my_char[LMAX];
 };
 
-void struct_check(struct params);
+void struct_check(struct params *);
 
 #ifdef __cplusplus
 }

src/c/struct_lib.c

@@ -6,20 +6,22 @@
 #include "my_struct.h"
 
 
-void struct_check(struct params s) {
+void struct_check(struct params *s) {
 
-if (s.my_int != 123) {
-  fprintf(stderr, "Error: my_int = %d\n", s.my_int);
+struct params *p = s;
+
+if (p->my_int != 123) {
+  fprintf(stderr, "Error: my_int = %d\n", p->my_int);
   exit(EXIT_FAILURE);
 }
 
-if (! s.my_bool) {
+if (! p->my_bool) {
   fprintf(stderr, "Error: my_bool is false\n");
   exit(EXIT_FAILURE);
 }
 
-if (strncmp(s.my_char, "Hello", 5) != 0) {
-  fprintf(stderr, "Error: my_char != Hello: %s\n", s.my_char);
+if (strncmp(p->my_char, "Hello", 5) != 0) {
+  fprintf(stderr, "Error: my_char != Hello: %s\n", p->my_char);
   exit(EXIT_FAILURE);
 }
 

src/c/struct_main.c

@@ -12,7 +12,7 @@ s.my_int = 123;
 s.my_bool = true;
 strcpy(s.my_char, "Hello");
 
-struct_check(s);
+struct_check(&s);
 
 return EXIT_SUCCESS;
 

src/cxx/struct_lib.cxx

@@ -4,20 +4,22 @@
 
 #include "my_struct.h"
 
-void struct_check(struct params s) {
+void struct_check(struct params *s) {
 
-if (s.my_int != 123) {
-  std::cerr << "Error: my_int = " << s.my_int << std::endl;
+struct params *p = s;
+
+if (p->my_int != 123) {
+  std::cerr << "Error: my_int = " << p->my_int << std::endl;
   exit(EXIT_FAILURE);
 }
 
-if (! s.my_bool) {
+if (! p->my_bool) {
   std::cerr << "Error: my_bool is false" << std::endl;
   exit(EXIT_FAILURE);
 }
 
-if (strncmp(s.my_char, "Hello", 5) != 0) {
-  std::cerr << "Error: my_char != Hello " << s.my_char << std::endl;
+if (strncmp(p->my_char, "Hello", 5) != 0) {
+  std::cerr << "Error: my_char != Hello " << p->my_char << std::endl;
   exit(EXIT_FAILURE);
 }
 

src/cxx/struct_main.cxx

@@ -11,7 +11,7 @@ s.my_int = 123;
 s.my_bool = true;
 strcpy(s.my_char, "Hello");
 
-struct_check(s);
+struct_check(&s);
 
 return EXIT_SUCCESS;