【c语言】判断两个文件是否一致

发表于 | 分类于

学习笔记

判断两个文件是否一致 并打印出第一个不同行
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
#include <stdio.h>;
#include <string.h>;
#define MAXLINE 100

void diff(char *a, char *b);
int main(int argc, char *argv[])
{
    if(3 != argc){
        printf("参数不正确\n");
        return -1;
    }

    diff(argv[1], argv[2]);

    return 0;
}

void diff(char *a, char *b)
{
    FILE *afp;
    FILE *bfp;
    char aline[MAXLINE];
    char bline[MAXLINE];

    if((afp = fopen(a, "r")) == NULL){
        printf("Error: not file %s", a);
        return;
    }

    if((bfp = fopen(b, "r")) == NULL){
        printf("Error: not file %s", b);
        return;
    }

    while((fgets(aline, MAXLINE, afp) == aline) &amp;&amp; (fgets(bline, MAXLINE, bfp) == bline)){
        if(strcmp(aline, bline) != 0){
            printf("%s:%s", a, aline);
            printf("%s:%s", b, bline);
            break;
        }
    }
    fclose(afp);
    fclose(bfp);
}