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Codice: Seleziona tutto

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define MAXLN 80

int main()
{
	char strIN[MAXLN], strOUT[MAXLN], strWORK[MAXLN];
	FILE *fpIN, *fpOUT;
	int code, i, c;

	printf("Inserire nome file:");
	scanf("%s",&strIN);
	if((fpIN=fopen(strIN,"r"))==NULL)
	{
		fprintf(stderr,"Errore apertura file");
		return EXIT_FAILURE;
	}
	printf("Inserire codice:");
	scanf("%d",&code);
	printf("Inserire nome output:");
	scanf("%s",&strOUT);
	if((fpOUT=fopen(strOUT,"w"))==NULL)
	{
		fprintf(stderr,"Errore creazione output");
		return EXIT_FAILURE;
	}

	while((fgets(strWORK,MAXLN,fpIN))!=NULL)
	{
		for(i=0;i<strlen(strWORK);i++)
		{	
			c=strWORK[i];
			if(islower(c))
			{
				toupper(c);
				if(c>=('Z'-code+1))
					c='Z'-c+1-code;
				else
					c+=code;
				tolower(c);
				strWORK[i]=(char)c;
			}
			else
			{
				if(c>=('Z'-code+1))
					c='Z'-c+1-code;
				else
					c+=code;
				strWORK[i]=(char)c;
			}		
		}
		fputs(strWORK,fpOUT);
	}

	fclose(fpIN);
	fclose(fpOUT);
	return EXIT_SUCCESS;
}

Codice: Seleziona tutto

<< scanf("%s",&strOUT);
>> scanf("%s", strOUT);