56 lines
773 B
C
56 lines
773 B
C
#include <stdio.h>
|
|
|
|
void echange_1(int x, int y) {
|
|
int tmp;
|
|
|
|
tmp = x;
|
|
x = y;
|
|
y = tmp;
|
|
}
|
|
|
|
void echange_2(int *x, int *y) {
|
|
int *tmp;
|
|
|
|
tmp = x;
|
|
x = y;
|
|
y = tmp;
|
|
}
|
|
|
|
void echange_3(int *x, int *y) {
|
|
int tmp;
|
|
|
|
tmp = *x;
|
|
*x = *y;
|
|
*y = tmp;
|
|
}
|
|
|
|
void echange_4(int *x, int *y) {
|
|
int *tmp;
|
|
|
|
*tmp = *x;
|
|
*x = *y;
|
|
*y = *tmp;
|
|
}
|
|
|
|
// Expliquer de façon détaillée et justifiée ce qu'on obtient à l'exécution.
|
|
|
|
int main(void) {
|
|
int a = 1, b = 2;
|
|
echange_1(a, b);
|
|
printf("a = %d, b = %d\n", a, b);
|
|
|
|
a = 1, b = 2;
|
|
echange_2(&a, &b);
|
|
printf("a = %d, b = %d\n", a, b);
|
|
|
|
a = 1, b = 2;
|
|
echange_3(&a, &b);
|
|
printf("a = %d, b = %d\n", a, b);
|
|
|
|
a = 1, b = 2;
|
|
echange_4(&a, &b);
|
|
printf("a = %d, b = %d\n", a, b);
|
|
|
|
return 0;
|
|
}
|