first commit

取款.c

@@ -0,0 +1,39 @@
+void qukuan()
+{
+	float m;
+	int i,u;
+	FILE *fp=fopen("users.txt","r");
+    FILE *fpw=fopen("qukuan.txt","w");
+    printf("请输入您的取款金额: ");
+	scanf("%f",&m);
+	for(i=0;i<n;i++)
+	{
+		fscanf(fp,"%s %s %f\n",&zh[i].gUser,&zh[i].gMima,&zh[i].YuE);
+		if(i==h)
+		{
+			if(m<=zh[i].YuE)
+			{
+				printf("取款成功！\n"); 
+				printf("请取走您的钞票。\n");
+				zh[i].YuE=zh[i].YuE-m;
+				u=i;
+				fprintf(fpw,"%s %s %f\n",zh[i].gUser,zh[i].gMima,zh[i].YuE);
+			}
+			else
+			{
+				printf("您的余额不足，请重新输入。\n");
+				fclose(fp);fclose(fpw);
+				qukuan();break;
+			}
+		}
+		else
+		{
+			fprintf(fpw,"%s %s %f\n",zh[i].gUser,zh[i].gMima,zh[i].YuE);
+		}
+	}
+	printf("您的当前余额:%.3f\n",zh[u].YuE);
+	fclose(fp);fclose(fpw);
+	remove("users.txt");
+	rename("qukuan.txt","users.txt");
+}
+