c语言 难题,c语言难题，求大虾解答！！！！！

#include

const char * in_File = “r.txt”;

const char * out_File =”w.txt”;

int main(){

char str[255];

char str1[500];

char str2[500];

char temp;

int i = 0,j = 0;

FILE *inFile = fopen(in_File,”r”);

FILE *outFile = fopen(out_File,”w”);

//把文件中的字符读到str字符数组中

while(true){

temp = fgetc(inFile);

if(temp!=EOF&&temp!=’@’)

str[i++] = temp;

else

break;

}

(temp!=’@')?(str[i] = ‘\0′):(str[i++]=’@',str[i]=’\0′);

//对从文件中读取的字符进行第一步操作

i = 0;

while(str[i]!=’\0′){

if(str[i]>’0′&&str[i]<=’9′){

for(int k=str[i]-’0′ ;k>0 ;k– ){

str1[j++] = str[i+1];

}

i++;

str1[j++] = str[i++];

}

else{

if(str[i]!=’0′)

str1[j++] = str[i++];

else

i++;

}

}

str1[j]=’\0′;

//第二步  加上空格

i = j = 0;

str2[j++]=str1[i++];

while(str1[i]!=’\0′){

if(i%3==0)

str2[j++]=’ ‘;

str2[j++]=str1[i++];

}

str2[j]=’\0′;

fputs(str2,outFile);

fclose(inFile);

fclose(outFile);

return 0;

}