rept.c

C.Game.Programming.For.Dummies原码

#include <stdio.h>
#include <stdlib.h>

void main(int argc,char *argv[])
{
	int x,r;
	char c;

	if(argc<2)		//no options typed
	{
		printf("This program requires two options:\n");
		printf("REPT c r\n");
		printf("C is the character to repeat and R is\n");
		printf("the number of times to repeat it.\n");
		exit(0);		//quit the program right here
	}
/*
They typed in both options. argv[1] contains the character
to repeat, and argv[2] is the number of times to repeat it
*/
	c=argv[1][0];		//get the character
	r=atoi(argv[2]);	//get the repeat count

	for(x=0;x<r;x++)
		putchar(c);	//display the character
}