replace

replace

[CF-1-3.1]
/*
    author : kyoung chip jang
    date : 
    descript:     
    
*/
#include
#include
int main( int argc , char** argv )
{
    FILE* fpr,*fpw;
    
    char bufr[256],bufw[256];
    char str1[] = "dog";
    char str2[] = "rabbit";
    
    char *p , *q;
    
    if( !(fpr=fopen("dog.txt","r")))
    {
        printf(" cant file open\n"); 
        return 1;
    } 
    if( !(fpw=fopen("rabbit.txt","w")))
    {
        printf(" cant file open\n"); 
        return 1;
    } 
    while(1)
    {
        fgets( bufr , 256 , fpr );    
        
        if( bufr[0] == '\0' ) break;
        printf( "%x \n" , bufr[0] );
        strcpy( bufw, bufr );
        p = strstr( bufr ,str1 );
        if(p)
        {
            q = bufw + ( p - bufr );
            strcpy( q , str2 );
            strcpy( q + strlen(str2) , p+strlen(str1));           
        }
        fprintf(fpw , "%s", bufw);
        
        if( feof( fpr ) )
        {
            printf(" bufr = %s \n" , bufr );
            break;        
        }
        bufr[0] = '\0';
     
     
    }
    fclose(fpr);
    fclose(fpw);

return 0; 
}
 
 
 
[CF-1-3.2]
 
/*
    author : kyoung chip jang
    date : 
    descript:     
    
*/
#include
#include
void c_replace( char *desc , char *src , char * desc_str , char * src_str );
int main( int argc , char** argv )
{
    FILE* fpr,*fpw;
    
    char bufr[256],bufw[256];
    char str1[] = "dog";
    char str2[] = "rabbit";
    
    
    if( !(fpr=fopen("dog.txt","r")))
    {
        printf(" cant file open\n"); 
        return 1;
    } 
    if( !(fpw=fopen("rabbit.txt","w")))
    {
        printf(" cant file open\n"); 
        return 1;
    } 
    while(1)
    {
        fgets( bufr , 256 , fpr );    
        
        c_replace( bufw, bufr , str2 , str1 );
        fprintf(fpw , "%s", bufw);
        
        if( feof( fpr ) )
        {
            printf(" bufr = %s \n" , bufr );
            break;        
        }
        bufr[0] = '\0';
     
     
    }
    fclose(fpr);
    fclose(fpw);
return 0; 
}
void c_replace( char *desc , char *src , char * desc_str , char * src_str )
{
    char *p = NULL;
    char *q = NULL;
    if( src[0] == '\0' ) return;
    // printf( "%x \n" , src[0] );
    strcpy( desc, src );
    p = strstr( src ,src_str );
    if(p)
    {
        q = desc + ( p - src );
        strcpy( q , desc_str );
        strcpy( q + strlen(desc_str) , p+strlen(src_str));           
    } 
 
}