if ((fp=fopen("student.bin","wb"))==NULL)

if ((fp=fopen("student.bin","wb"))==NULL) if((fp=fopen("d=\\jrzh\\example\\stu-list","wb+"))==NULL)中的N if ((fp==fopen(filename,"w"))==NULL) 改为 if ((fp=fopen(filena if((fp=fopen_s("E:\student.txt","wb"))==NULL),这个代码老是提示错误 if((fp=fopen("date.txt","w"))==NULL) { printf("File open err if ((fp=fopen("date.txt","r"))==NULL)是什么意思? if((fp=fopen("text.txt","ab+"))==NULL)其中ab+啥意思 if(fp = fopen("bank_txt","w") == NULL) { printf("can not ope 代码if((fp=fopen(filename,"r"))==NULL) { fprintf(stderr,"Error fp=fopen(p, fp=fopen("DATA_KEHU", fp=fopen(argv[2],"wb ");fy=my-y[i];