用C语言修改bin文件里面的数据
要判断出 出连续两个字节05 01 的这种组合
然后把这这种组合中的05改成 01
逻辑很简单
但是文件我用文件指针判断出了这种情况，怎么把将它写入bin文件呢 c语言 指针
[解决办法]
仅供参考
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXN 40
#define MAX2N 80
FILE *fi,*fo;
char sn[_MAX_PATH],dn[_MAX_PATH],f[MAX2N],bw[MAXN],bf[MAXN+sizeof(int)-1],bx[MAXN],br[MAXN+sizeof(int)-1],bb[MAXN];
char *ag[MAXN];
int L,i,j,k,lenf,lenr,find,match;
__int64 off;
void FR() {
printf("\n");
printf("Src : %s\n",sn);
if (find==0) {
printf("Dest: %s\n",dn);
}
for (i=0;i<lenf;i++) {
bb[i]=fgetc(fi);
}
off=0i64;
while (1) {
match=1;
for (j=0;j<lenf;j++) {
if (bw[j]==0&&bf[j]==bb[j]) continue;
if (bw[j]==1) continue;
match=0;
break;//
}
if (match==1) {
printf("%016I64X\n",off);
if (find==0) {
for (j=0;j<lenf;j++) {
if (bx[j]==0) fputc(br[j],fo);
else fputc(bb[j],fo);
}
}
for (i=0;i<lenf;i++) {
bb[i]=fgetc(fi);
if (feof(fi)) break;//
}
if (feof(fi)&&find==0) {
for (j=0;j<i;j++) fputc(bb[j],fo);
break;//
}
if (feof(fi)) break;//
else off+=(__int64)lenf;
} else {
if (find==0) {
fputc(bb[0],fo);
}
memmove(bb,bb+1,lenf-1);
bb[lenf-1]=fgetc(fi);
off++;
if (feof(fi)) {
if (find==0) {
for (j=0;j<lenf-1;j++) fputc(bb[j],fo);
}
break;//
}
}
}
}
int main() {
while (1) {
printf("Find & Replace, designed by zhao4zhong1@163.com\n");
printf("Src file name:");
fflush(stdout);
fgets(sn,_MAX_PATH,stdin);
if ('\n'==sn[0]) break;//
L=strlen(sn);if ('\n'==sn[L-1]) sn[L-1]=0;
if ((fi=fopen(sn,"rb"))==NULL) {
printf("Can not open %s!",sn);
break;//
}
while (1) {
printf("Dest file name:");
fflush(stdout);
fgets(dn,_MAX_PATH,stdin);
if ('\n'==dn[0]) break;//
L=strlen(dn);if ('\n'==dn[L-1]) dn[L-1]=0;
if (strcmpi(sn,dn)==0) printf("Error: Src file name[%s] == Dest file name[%s]!\n",sn,dn);
else if ((fo=fopen(dn,"rb"))!=NULL) {
fclose(fo);
printf("Error: Dest file already exists!\n");
} else break;//
}
printf("Find :");
fflush(stdout);
fgets(f,MAX2N,stdin);
L=strlen(f);if ('\n'==f[L-1]) f[L-1]=0;
if (f[0]=='\'') {
lenf=strlen(f)-1;
for (j=0;j<lenf;j++) {
if (f[j+1]=='?') bw[j]=1;
else {
bw[j]=0;
bf[j]=f[j+1];
}
}
} else {
i=0;
for (j=0;j<MAXN;j++) {
if (f[i]==0x0D
[解决办法]
f[i]==0x0A
[解决办法]
f[i]==0x1A
[解决办法]
f[i]==0) {
f[i]=0;
break;//
}
while (f[i]==' '
[解决办法]
f[i]==9) {
f[i]=0;
i++;
}
ag[j]=f+i;
while (f[i]!=9&&f[i]!=' '&&f[i]!=0x0D&&f[i]!=0x0A&&f[i]!=0x00) i++;
}
lenf=j;
for (i=0;i<lenf;i++) {
if (isxdigit(ag[i][0])) {
bw[i]=0;
sscanf(ag[i],"%2x",&bf[i]);
} else {
bw[i]=1;
}
}
}
printf("Replace:");
fflush(stdout);
fgets(f,MAX2N,stdin);
L=strlen(f);if ('\n'==f[L-1]) f[L-1]=0;
if (f[0]==0
[解决办法]
'\n'==dn[0]) find=1;
else {
if (f[0]=='\'') {
lenr=strlen(f)-1;
if (lenr!=lenf) {
printf("Error: Find len != Replace len");
fclose(fi);
break;//
}
find=0;
fo=fopen(dn,"wb");
for (j=0;j<lenr;j++) {
if (f[j+1]=='?') bx[j]=1;
else {
bx[j]=0;
br[j]=f[j+1];
}
}
} else {
i=0;
for (j=0;j<MAXN;j++) {
if (f[i]==0x0D
[解决办法]
f[i]==0x0A
[解决办法]
f[i]==0x1A
[解决办法]
f[i]==0) {
f[i]=0;
break;//
}
while (f[i]==' '
[解决办法]
f[i]==9) {
f[i]=0;
i++;
}
ag[j]=f+i;
while (f[i]!=9&&f[i]!=' '&&f[i]!=0x0D&&f[i]!=0x0A&&f[i]!=0x00) i++;
}
lenr=j;
if (lenr!=lenf) {
printf("Error: Find len != Replace len");
fclose(fi);
break;//
}
find=0;
fo=fopen(dn,"wb");
for (i=0;i<lenr;i++) {
if (isxdigit(ag[i][0])) {
bx[i]=0;
sscanf(ag[i],"%2x",&br[i]);
} else {
bx[i]=1;
}
}
}
}
if (lenf<=0) break;//
FR();
fcloseall();
}
return 0;
}
[解决办法]
仅供参考
#include <stdio.h>
#include <string.h>
int main()
{
FILE *fp;
char s[1024]; /*可以设置更大的数组*/
char p[6];
int ch;
int i = 0;
int j;
char *str = "05 01"; /*假定两个字节之间有一个空格*/
p[5] = '\0';
fp = fopen("1.txt","r+"); /*用你的文件名代替*.bin */
while ((ch = fgetc(fp)) != EOF)
{
s[i] = ch;
i++;
}
s[i] = '\0';
for (i=0; i+5<strlen(s);)
{
for (j=0; j<5; j++)
{
p[j] = s[i+j];
}
if ( strcmp(p,str) == 0)
{
s[i+1] = '1';
i += 5;
}
else
{
i++;
}
}
if (!fseek(fp,0L,SEEK_SET))
{
for (i=0; i<strlen(s); i++)
{
fputc(s[i],fp);
}
}
fclose(fp);
return 0;
}