?? main.c
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#include <stdio.h>#include <stdlib.h>int factorial (int n);int main (int argc, char **argv){ int n; if (argc < 2) { printf ("Usage: %s n\n", argv [0]); return -1; } else { n = atoi (argv[1]); printf ("Factorial of %d is %d.\n", n, factorial (n)); } return 0;}?? 快捷鍵說明
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