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本帖最后由 rosynirvana 于 2014-4-26 20:27 编辑
改好后的代码
- #include <stdio.h>
- #include <stdlib.h>
- int main()
- {
- FILE *fp, *fp2;
- char old[16], enc[16], dec[16];
- int num;
- printf("passwd:");
- scanf("%s",old);
- for(num=0;old[num];num++)
- enc[num] = old[num] + 1;
- enc[num] = '\0';
-
- fp=fopen("fp.txt","w");
- fprintf(fp,"%s",enc);
- fclose(fp);
- fp2=fopen("fp2.txt","w");
- for(num=0;old[num];num++)
- dec[num] = enc[num] - 1;
- dec[num] = '\0';
- fprintf(fp2,"%s",dec);
- fclose(fp2);
- system("pause");
- return 0;
- }
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