c语言保存文件到指定的路径和文件名？

fp=fopen(filename,"wb")

里的filename就表示了文件的路径及文件名，所以要把输入的文件名和文件路径拼接起来，计算出这个filename

最好过滤一下别让路径和文件名中有非法字符，比如:\/+<>什么的。

scanf也限制一下长度。

scanf("%19s",filename)

scanf("%19s",path)

参考如下：

#include <stdio.h>

#include <stdlib.h>

int main(void)

{

FILE *fp

char ch, filename[20], path[20],buffer[40]

printf("Enter the file name: ")

scanf("%s",filename)

printf("Enter the path: ")

scanf("%s",path)

sprintf(buffer, "%s\\%s", path,filename)

printf("\nto end input ,press Ctrl+Z in newline,then ENTER:\n")

if((fp=fopen(buffer,"wt+"))==NULL)

{

printf("no such path, \nstrike any key exit!")

getch()

exit(1)

}

while ((ch=getchar())!=-1) ch=fputc(ch,fp)

fclose(fp)

printf("==================================\n\n")

printf("file path \"%s\" \nfile name \"%s\":\nand its content:\n",path,filename)

fp=fopen(buffer,"rt")

while ((ch=fgetc(fp))!=-1) putchar(ch)

fclose(fp)

return 0

#include<stdio.h>

#include<io.h>

void main()

{

        int h

        char filename[20]                                    /*定义字符数组存储文件名*/

        LOOP:

        printf("please input filename:\n")

        scanf("%s",&filename)                                /*输入文件名及路径*/

        if(h=creat(filename,0)==-1)

        {

            printf("\n Error! Cannot vreat!\n")            /*错误提示*/

            goto LOOP                                    /*跳到LOOP处*/

    }

        else

        {

            printf("\nthis file has created!\n")                        /*成功提示*/

            close(h)

        }

}

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