Re-use passed pointers for cheap iteration

1 files changed, 4 insertions, 10 deletions

diff --git a/funcptr.c b/funcptr.c
index 478beca..33d4154 100644
--- a/funcptr.c
+++ b/funcptr.c
@@ -22,18 +22,12 @@ int half(int i) {
 static int (*fpv[])(int) = {doub, trip, half, NULL};
 
 void fpv_exec(int (**fpv)(int), int n) {
-    int i;
-    for (i = 0; *(fpv + i) != NULL; i++) {
-        printf("%d\n", (*(fpv + i))(n));
-    }
+    while (*fpv)
+        printf("%d\n", (*fpv++)(n));
 }
 
 int main(int argc, char **argv) {
-    int i;
-    for (i = 1; i < argc; i++) {
-        fpv_exec(fpv, atoi(argv[i]));
-    }
-
+    for (argv++, argc--; argc; argv++, argc--)
+        fpv_exec(fpv, atoi(*argv));
     exit(EXIT_SUCCESS);
 }
-