编写一个别程序，比较两个文件打印它们第一个不相同的行。
#include <stdio,h>
#include <stdilb.h>
#include <string.h>
#define MAXLINE 100
main (int argc ,char * argv [])
{
LILE *fp1,*fp2;
void filecomp (FILE *fp1, FILE *fp2);
if (argc ! =3){
fprintf(stderr, "comp:need two file name /n");
exit (1);
}else {
if ((fp1 = fopen (*++argv ,"r")) == NULL){
fprintf(stderr,"comp: can't open %s /n",*argv);
exit (1);
}else if ((fp2 + fopen (* ++argv ,"r")) ==NULL) {
fprintf(stderr,"comp: can't open A%s /n",*argv );
exit (1);
} else {
filecomp( fp1,fp2);
fclose (fp1);
fclose (fp2);
exit (0);
}
}
}
void filecomp(FILE *fp1,FILE *fp2)
{
char line 1[MAXLLINE],line 2[MAXLINE];
char *lp1,*fp2;
do {
lp1 = fgets (line 1, MAXLINE,fp1);
lp2 = fgets (line 2, MAXLINE,fp2);
if (lp1 == line 1 && lp2 == line 2){
if (strcmp(line 1,line 2)! =0){
printf("first different in line /n%s/n",line 1);
lp1 =lp2=NULL;
}
}else if (lp1 !=line 1&&lp2 ==line 2)
printf("end of first file at line /n%s/n",line 2);
else if (lp1 == line 1&&lp2 !=line 2)
printf("end of second file at line /n%s/n",line 1);
} while (lp1 == line 1&&lp2 ==line 2);
}