比较两个文本文件是否相同 并输出两个文件内容首次出现不同的行号和字符位置

//---------------------------------------------------------------------------

#include
#include
#define MA 255
int icmp(const char *a,const char *b)
{
int i;
for (i = 0; a[i]&&b[i]; i++) {
if (a[i]!=b[i]) {
break;
}
}
return i+1;
}
int main(void)
{
FILE *fp1,*fp2;
int n=0,fg=0;
char c1[MA],c2[MA];
fp1=fopen("c:\\a.txt","r"); /*第一个文件*/
fp2=fopen("c:\\b.txt","r"); /*第二个文件*/
while (!feof(fp1)&&!feof(fp2))
{
fgets(c1,MA,fp1);
fgets(c2,MA,fp2);
++n;
if (strcmp(c1,c2)) {
printf("第%d行第%d个字符不相同\n",n,icmp(c1,c2));
fg=1;
}
fflush(fp1);
fflush(fp2);
}

if (!fg) {
printf("两个文件相同");
}
else if (!feof(fp1)||!feof(fp2)) {
printf("第%d行不相同",n);
}
fclose(fp1);
fclose(fp2);
return 0;
}
//---------------------------------------------------------------------------