[問題] argc問題
這是一個用來 copy 一檔案 至 另一檔案程式，我complier後會產生一個Projec.exe
在MS-DOS模式下，鍵入如下指令: Project.exe a.txt b.txt 即可將a的內容複製到b
問題是：是否可以在另一個程式直接呼叫我的Proect.exe就可以產生同樣功能？
#include <stdio.h>
#include <stdlib.h>
void main(int argc, char *argv[])
{
char c;
int toScreen = 1;
FILE *fpin, *fpout;
if(argc < 2 || argc > 3)
{ printf("The correct format is: copyFile file1 file2\n");
exit(1);
}
fpin = fopen(argv[1], "r");
if( !fpin )
{ printf("The file: %s is not found!\n", argv[1]);
return;
}
if(argc == 3)
{ fpout = fopen(argv[2], "w");
if( !fpout )
{ printf("The file: %s is not found, or no available space!\n", argv[2]);
return;
}
toScreen = 0;
}
while( (c=getc(fpin)) != EOF)
{ if( toScreen )
putchar(c);
else
putc(c, fpout);
}
fclose(fpin);
if( !toScreen)
fclose(fpout);
}
--
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