13-2.txt

c primer 部分习题答案

PE 13-2
 
/* Programming Exercise 13-2 */
#include <stdio.h>
#include <stdlib.h>
//#include <console.h>    /* Macintosh adjustment */
 
 
int main(int argc, char *argv[])
{
    int byte;
    FILE * source;
    FILE * target;
    
//    argc = ccommand(&argv);   /* Macintosh adjustment */
 
    if (argc != 3)
    {
        printf("Usage: %s sourcefile targetfile\n", argv[0]);
        exit(EXIT_FAILURE);
    }
    
 
    if ((source = fopen(argv[1], "rb")) == NULL)
    {
        printf("Could not open file %s for input\n", argv[1]);
        exit(EXIT_FAILURE);
    }
    if ((target = fopen(argv[2], "wb")) == NULL)
    {
        printf("Could not open file %s for output\n", argv[2]);
        exit(EXIT_FAILURE);
    }
    while ((byte = getc(source)) != EOF)
    {
        putc(byte, target);
    }
    if (fclose(source) != 0)
        printf("Could not close file %s\n", argv[1]);
    if (fclose(target) != 0)
        printf("Could not close file %s\n", argv[2]);
        
    return 0;
}