程序代码：

#include <stdio.h>
#include <string.h>
#include <cstdlib>
int chaxun(char *);
int main()
{
    FILE *fin,*fin2;
char str[80],ch[60];
int h1,h2,m1,m2,s1,s2,a,i;
long t_start,t_end,interval;
int c,cee=0,cee1=0,cee2=0,cee3=0;
double fee=0.0,fee1=0,fee2=0,fee3=0;
fin=fopen("dial.txt","r");
if(!fin)
return -1;
while(!feof(fin)){
if(!fgets(str,80,fin))break;
if(str[0]=='i'||str[0]=='n')continue;
if(str[0]=='m'){fee2+=0.10;cee2+=1;continue;}
h1=(str[2]-48)*10+str[3]-48;
m1=(str[5]-48)*10+str[6]-48;
s1=(str[8]-48)*10+str[9]-48;
h2=(str[11]-48)*10+str[12]-48;
m2=(str[14]-48)*10+str[15]-48;
s2=(str[17]-48)*10+str[18]-48;
t_start=h1*60*60+m1*60+s1;
t_end=h2*60*60+m2*60+s2;
if(t_end-t_start<0)
interval=(24*60*60)-t_start+t_end;
else interval=t_end-t_start;
c=interval/60;
if(interval%60)
c++;
for(i=0;i<4;i++)
ch[i]=str[20+i];
ch[4]='\0';
if(strcmp(ch,"0555")==0)
a=1;
else
{for(i=0;i<7;i++)
ch[i]=str[20+i];
ch[7]='\0';
a=chaxun(ch);}
if(a==1)
{fee+=c*0.08;cee+=c;}
else
{fee1+=c*0.20;cee1+=c;}
fee3=fee+fee1+fee2;
}
fclose(fin);
printf("本月通话统计：\n");
printf("本地通话时间：%d分钟\t费用：%lf元\n",cee,fee);
printf("长途通话时间：%d分钟\t费用：%lf元\n",cee1,fee1);
printf("发出短信条数：%d条  \t费用：%lf元\n",cee2,fee2);
printf("总计：本月应缴费用：%lf元\n",fee3);


fin2=fopen("abc.txt","w");
fprintf(fin2,"本月通话统计：\n");
fprintf(fin2,"本地通话时间：%d分钟\t费用：%lf元\n",cee,fee);
fprintf(fin2,"长途通话时间：%d分钟\t费用：%lf元\n",cee1,fee1);
fprintf(fin2,"发出短信条数：%d条  \t费用：%lf元\n",cee2,fee2);
fprintf(fin2,"总计：本月应缴费用：%lf元\n",fee3);
fclose(fin2);
system("pause");
return 0;

}
int chaxun(char *str1)
{FILE *fin1;
char str2[80];
    fin1=fopen("hd.txt","r");
while(!feof(fin1)){
if(!fgets(str2,8,fin1))break;
if(strcmp(str2,str1)==0){fclose(fin1);
return 1;}
}fclose(fin1);return 0;}