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FILE *fp1;
fp1=fopen("C:/Users/yf/Documents/Visual Studio 2010/Projects/ReadTime/ReadTime/ReadTime.xls","a+"); // fp指针指向文件头部
fseek(fp1, 0, SEEK_END);
if(fp1 == NULL)
{
printf("打开失败\n");
system("PAUSE");
}
system("PAUSE");
int aa=1000;
char str[20];
char* str11 = "\n上\t下";
fputs(str11, fp1);
char* str1 = "\n\t";
fputs(str1, fp1);
itoa(aa, str, 10);
fputs(str, fp1);
printf("打开成功\n");
fclose(fp1);
之前测试持续写入数据的代码,看看是否对你有帮助吧