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#include <stdio.h>#include <stdlib.h>int main(int argc, char **argv) {	char puffer[16];	while(puffer[0])	{			int i=1;		printf("[N]ext,[P]re or exit : ");		scanf("%15s", puffer);		                /* zeichenweise */                if( puffer[0] == 'N' || puffer[0] == 'n' )			i++;                /* zeichenweise case insensitive (nur ASCII) */                if( puffer[0] | (1<<5) == 'n' )                        i++;                /* strings bel. länge case-insensitive vergleichen */                if( !strncasecmp(puffer, "n", 1) )                        i++;		printf("argv[%d] :  %s \n", i, argv[i]);	}}