#include #include static void usage(char *); int main(int argc, char *argv[]) { int n; if (argc != 2) usage(argv[0]); n = atoi(argv[1]); printf("La boucle while s'exécute pour\n"); while (n > 0) { printf("- n = %d\n", n); n --; } return EXIT_SUCCESS; } static void usage(char *s) { fprintf(stderr, "Usage: %s «nombre»\n", s); exit(EXIT_FAILURE); }