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這是某人的程序,我需要爲我的項目收集數據。我無法理解指令#define IMAGE argv[1]
#define IFS argv[2]
指向的位置以及IMAGE和IFS中定義的值。這兩個命令是必要的,因爲它們稍後需要讀取文件名。無法理解argv [1]和arg [2]命令在這個程序中的位置
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <alloc.h>
#define IMAGE argv[1]
#define IFS argv[2]
get_image(FILE *ifs_file, unsigned int *assumed_width_of_image, unsigned int
*assumed_height_of_image, unsigned int *width_of_image, unsigned int *height_of_image, char *argv[]);
unsigned int *image;
main(int argc, char *argv[])
{
unsigned char dom[4][4], d1[4][4], ran[8][8], lowest_error, sym, bestsym, domain_whites,range_whites;
unsigned int assumed_width_of_image, assumed_height_of_image, width_of_image,
height_of_image;
unsigned long int count, domx, domy, ranx, rany, bestranx;
time_t start_time;
FILE *ifs_file;
start_time = time(NULL);
if (argc != 3) {
printf("\nUse the following format:\n\ncompress [image_file] [ifs_file]\n\n");
exit
}
if ((ifs_file = fopen(IFS, "wb")) == NULL) {
fprintf(stderr, "\nError opening file %s\n", IFS);
exit(1);
}
get_image(ifs_file, &assumed_width_of_image, &assumed_height_of_image, &width_of_image, &height_of_image, argv);
get_image(FILE *ifs_file, unsigned int *assumed_width_of_image, unsigned int
*assumed_height_of_image, unsigned int *width_of_image, unsigned int *height_of_image, char *argv[])
{
FILE *image_file;
unsigned int buf[24], *header, size_of_header, extra_height;
unsigned long size_of_file, size_of_image;
if ((image_file = fopen(IMAGE, "rb")) == NULL) {
fprintf(stderr, "\nCannot open file %s\n", IMAGE);
exit(1);
}
if (fread(buf, sizeof(unsigned int), 24, image_file) != 24) {
fprintf(stderr, "\nError reading file %s\n", IMAGE);
exit(1);
}
if (buf[0] != 19778) {
printf("%s is not a .BMP file", IMAGE);
exit(0);
}
if (buf[23] != 2) {
printf("%s is not a black and white image", IMAGE);
exit(0);
}
順便說一句,使用'#define'這絕對是可怕的。他們可以廉價地使用'char * IMAGE = argv [1],IFS = argv [2]'將其定義爲局部變量。我會建議OP,您修改代碼並執行此操作。 –
對不起,我是初學者,我不知道如何指定它。請給我解釋一下如何做到這一點?我在eclipse中運行這個程序,每次運行它時 - 我都會得到輸出以文件格式進行修正。 – pinvpn
@ChrisHayes是正確的,不是一個好主意。 – FaddishWorm