等级考试上机题目(上课用)(10)

{char sfname[20] ="myfile1",tfname[20]="myfile2";

FILE *myf; int i; char c;

myf=fopen(sfname,"w");

printf("\nThe original data :\n");

for(i=1; i<30; i++){c='A'+rand()%25;fprintf(myf, "%c",c);

printf("%c",c);}

fclose(myf);printf("\n\n");

if (fun(sfname, tfname) ) printf("Succeed!");

else printf("Fail!");

}

2．程序改错题

#include <stdio.h>

void fun (long s, long *t)

{int d;

long sl=1;

*t = 0;

while (s > 0)

{d = s%10;

/************found************/

if (d%2=0)

{ *t=d* sl+ *t;

sl *= 10;

}

/************found************/

s \= 10;

}

}

main()

{long s, t;

printf("\nPlease enter s:"); scanf("%ld", &s);

fun(s, &t);

printf("The result is: %ld\n", t);

}

3．程序设计题

10