[C語言] 比對兩個檔案中的 list

這是用很簡單的方式比對兩個檔案中的 list
並不是很有效率就是了，只是希望比 shell 快一點

當 diffPath 檔案中的項目不在 basePath 的檔案裡，就會 print 出來。

原始碼

1. #include <stdio.h> 
2. #include <errno.h> 
3. #include <string.h> 
4.  
5. #define BUFFER_SIZE     300    /*char buffer size*/ 
6.  
7. int main(int argc, char *argv[]) { 
8.    if(argc !=3 ){ 
9.        fprintf(stderr,"%s [diffPath] [basePath]\n",argv[0]); return 1; 
10.    } 
11.  
12.    FILE *diffFile, *baseFile; 
13.    char diffChars[BUFFER_SIZE], baseChars[BUFFER_SIZE]; 
14.  
15.    if((diffFile=fopen(argv[1], "r")) == NULL){ 
16.        fprintf(stderr,"can't open diff file\n"); return 1; 
17.    } 
18.    if((baseFile=fopen(argv[2], "r")) == NULL){ 
19.        fprintf(stderr,"can't open base file\n"); return 1; 
20.    } 
21.  
22.    while(!feof(diffFile)){ 
23.        /* read diff item */ 
24.        fscanf(diffFile,"%s\n",diffChars); 
25.  
26.        int isFind=0; 
27.        /* find item exist */ 
28.        rewind(baseFile); 
29.        while(!feof(baseFile)){ 
30.            fscanf(baseFile,"%s\n",baseChars); 
31.            if(strcmp(diffChars,baseChars) == 0){ isFind=1; break; } 
32.        } 
33.  
34.        /* not find itme */ 
35.        if(!isFind){ 
36.            printf("%s\n",diffChars); 
37.        } 
38.    } 
39.  
40.    fclose(diffFile); 
41.    fclose(baseFile); 
42.  
43.    return 0; 
44. } 

#include <stdio.h>
#include <errno.h>
#include <string.h>

#define BUFFER_SIZE     300    /*char buffer size*/

int main(int argc, char *argv[]) {
    if(argc !=3 ){
        fprintf(stderr,"%s [diffPath] [basePath]\n",argv[0]); return 1;
    }

    FILE *diffFile, *baseFile;
    char diffChars[BUFFER_SIZE], baseChars[BUFFER_SIZE];

    if((diffFile=fopen(argv[1], "r")) == NULL){
        fprintf(stderr,"can't open diff file\n"); return 1;
    }
    if((baseFile=fopen(argv[2], "r")) == NULL){
        fprintf(stderr,"can't open base file\n"); return 1;
    }

    while(!feof(diffFile)){
        /* read diff item */
        fscanf(diffFile,"%s\n",diffChars);
    
        int isFind=0;
        /* find item exist */
        rewind(baseFile);
        while(!feof(baseFile)){
            fscanf(baseFile,"%s\n",baseChars);
            if(strcmp(diffChars,baseChars) == 0){ isFind=1; break; }
        }

        /* not find itme */
        if(!isFind){
            printf("%s\n",diffChars);
        }
    }

    fclose(diffFile);
    fclose(baseFile);

    return 0;
}