ihex.c


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


int main (int argc, char **argv) {
	int i,s=0,t;  
	for (i = 1; i < argc; i++){ 
		sscanf(argv[i], "%X", &t);
		s+=t;
	}	
	printf("checksum=%02X\n",(-s)&0xff);
	return 0;
}