用fscanf\fprintf fgetc\fputc fgets\fputs实现文件拷贝。

 1.fscanf\fprintf

#include <stdio.h> 
int main(int argc, const char *argv[])
{   
    FILE* fp = fopen("./1.c", "r");
    if(NULL == fp)
    {   
        perror("fopen");
        return -1;
    }

    FILE* fp1 = fopen("./2.c", "w+");
    if(NULL == fp1)
    {   
        perror("fopen1");
        return -1;
    }

    int res;
    char buf;
    while(1)
    {   
        res = fscanf(fp, "%c", &buf);
        if(EOF == res)
            break;
        fprintf(fp1,"%c", buf);
    }
    
    fclose(fp);
    fclose(fp1);
    
    return 0;
}                                         

2.fgetc\fputc

#include <stdio.h>
int main(int argc, const char *argv[])
{
    FILE* fp = fopen("./1.c", "r");
    if(NULL == fp)
    {
        perror("fopen");
        return -1;
    }

    FILE* fp1 = fopen("./2.c", "w+");
    if(NULL == fp1)
    {
        perror("fopen1");
        return -1;
    }

    int res;
    char buf;
    while(1)
    {
        res = fgetc(fp);
        if(EOF == res)
            break;
        fputc(res,fp1);
    }
                                                   
/*  while(1)
    {
        res = fscanf(fp, "%c", &buf);
        if(EOF == res)
            break;
        fprintf(fp1,"%c", buf);
        
    }
*/
    fclose(fp);
    fclose(fp1);

    return 0;
}

3.fgets\fputs

#include <stdio.h>
int main(int argc, const char *argv[])
{
    FILE* fp = fopen("./1.c", "r");
    if(NULL == fp)
    {
        perror("fopen");
        return -1;
    }

    FILE* fp1 = fopen("./2.c", "w+");
    if(NULL == fp1)
    {
        perror("fopen1");
        return -1;
    }

    int* res=NULL;
    char buf[100];
    while(1)
    {
        res = fgets(buf, sizeof(buf), fp);
        if(NULL == res)
            break;
        fputs(buf, fp1);
    }


/*  while(1)
    {
        res = fgetc(fp);
        if(EOF == res)
            break;
        fputc(res,fp1);
    }
        
    while(1)
    {
        res = fscanf(fp, "%c", &buf);
        if(EOF == res)
            break;
        fprintf(fp1,"%c", buf);
        
    }
*/
    fclose(fp);
    fclose(fp1);

    return 0;
}