改进以下代码（用于复制文件）#include<stdio.h> int main() { FILE *f1; FILE *f2; char oriname[20]; char objname[20]; printf("please enter the name of the original file:\n"); scanf("%s",oriname); printf("please enter the name of the objective file:\n"); scanf("%s",objname); f1 = fopen(oriname,"r"); if(f1 == NULL) { printf("ORI FILE OPEN ERROR!\n"); } char str[6][20]; int i; for(i=0;i<6;i++) { fscanf(f1,"%s",str[i][20]); } fclose(f1); f2 = fopen(objname,"w"); if(f2 == NULL) { printf("OBJ FILE OPEN ERROR!\n"); } for(i=0;i<6;i++) { fprintf(f2,"%s",str[i][20]); } fclose(f2); return 0; }

改进后的代码如下：

#include <stdio.h>
#include <stdlib.h>

int main() {
    FILE *f1;
    FILE *f2;
    char oriname[20];
    char objname[20];

    printf("Enter the name of the original file: ");
    scanf("%s", oriname);
    printf("Enter the name of the objective file: ");
    scanf("%s", objname);

    f1 = fopen(oriname, "r");
    if (f1 == NULL) {
        printf("Error opening original file!\n");
        exit(1);
    }

    char str[6][20];
    int i;
    for (i = 0; i < 6; i++) {
        if (fscanf(f1, "%s", str[i]) != 1) {
            printf("Error reading from original file!\n");
            exit(1);
        }
    }
    fclose(f1);

    f2 = fopen(objname, "w");
    if (f2 == NULL) {
        printf("Error opening objective file!\n");
        exit(1);
    }
    for (i = 0; i < 6; i++) {
        if (fprintf(f2, "%s ", str[i]) < 0) {
            printf("Error writing to objective file!\n");
            exit(1);
        }
    }
    fclose(f2);

    printf("File copied successfully!\n");
    return 0;
}

改进说明：

1. 添加了头文件stdlib.h，以便使用exit函数。
2. 将输入提示语句改成了更加友好的语言。
3. 对文件打开、读取、写入等操作进行了错误检查，保证程序健壮性。
4. 读取和写入文件的方式有所修改，以确保正确性。