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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct {
char val1;
int val2;
char str[9];
} MY_STRUCT;
//#define INITILIZE_STRUCT_TO_ZERO
//#define TEST1 // première methode (si NITILIZE_STRUCT_TO_ZERO non defini, les structures ne sont pas identiques)
//#define TEST2 // seconde methode (les structures sont identiques)
#define TEST3 // troisieme methode (les structures ne sont pas identiques)
void modifyStruct(MY_STRUCT * ptStruct){
#ifdef TEST1
MY_STRUCT structTmp;
#ifdef INITILIZE_STRUCT_TO_ZERO
memset(&structTmp, 0, sizeof(structTmp));
#endif
structTmp.val1 = 1;
structTmp.val2 = 2;
memcpy(ptStruct, &structTmp, sizeof(structTmp));
#endif
#ifdef TEST2
ptStruct->val1 = 1;
ptStruct->val2 = 2;
#endif
}
int main(){
MY_STRUCT myStruct1;
MY_STRUCT myStruct2;
memset(&myStruct1, 0, sizeof(myStruct1));
memset(&myStruct2, 0, sizeof(myStruct2));
#ifdef TEST3
strcpy(myStruct2.str, "salut !");
strcpy(myStruct1.str, "hello world !"); // genere une erreur de comparaison
strcpy(myStruct1.str, "salut !");
#else
modifyStruct(&myStruct1);
myStruct2.val1 = 1;
myStruct2.val2 = 2;
#endif
if(memcmp(&myStruct1, &myStruct2, sizeof(myStruct1)) == 0){
printf("Structures identiques\n");
} else {
printf("Structures non identiques\n");
}
return 0;
} |
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