p376.7

A方案

1 #include
     
       2 #include
      
        3 #define LEN 40 4 void rank(FILE *, FILE *); 5 int main(void) 6 { 7     FILE *fp, *fc; 8     int ch, bp; 9     char file1[LEN], file2[LEN];10 11     puts("enter file1 name");12     if((fp=fopen(gets(file1), "r"))==NULL){13         fputs("can't open", stdout);14         exit(1);15     }16 17     puts("enter file2 name");18     if((fc=fopen(gets(file2), "r"))==NULL){19         fputs("can't open", stdout);20         exit(2);21     }22 23     rank(fp, fc);24     if((fclose(fp)!=0)||(fclose(fc)!=0))25         puts("error in closing files");26 27     system("pause");28     return 0;29 }30 31 void rank(FILE *fp, FILE *fc)32 {33     int ch, bp;34     while(1){35         while(((ch=getc(fp))!='\n')&&ch!=EOF)36             putc(ch, stdout);37         if(ch=='\n')38             putc(ch, stdout);39         while(((bp=getc(fc))!='\n')&&bp!=EOF)40             putc(bp, stdout);41         if(ch=='\n')42             putc(bp, stdout);43         if((ch==EOF)&&(bp==EOF))44             break;45     }46 }
      
     

B方案

1 #include
     
       2 #include
      
        3 #define LEN 40 4 void rank(FILE *, FILE *); 5 int main(void) 6 { 7     FILE *fp, *fc; 8     int ch, bp; 9     char file1[LEN], file2[LEN];10 11     puts("enter file1 name");12     if((fp=fopen(gets(file1), "r"))==NULL){13         fputs("can't open", stdout);14         exit(1);15     }16 17     puts("enter file2 name");18     if((fc=fopen(gets(file2), "r"))==NULL){19         fputs("can't open", stdout);20         exit(2);21     }22 23     rank(fp, fc);24     if((fclose(fp)!=0)||(fclose(fc)!=0))25         puts("error in closing files");26 27     system("pause");28     return 0;29 }30 31 void rank(FILE *fp, FILE *fc)32 {33     int ch, bp;34     while(1){35         while(((ch=getc(fp))!='\n')&&ch!=EOF)36             putc(ch, stdout);37         while(((bp=getc(fc))!='\n')&&bp!=EOF)38             putc(bp, stdout);39         if((bp=='\n')||(ch=='\n'))40             printf("\n");41         if((ch==EOF)&&(bp==EOF))42             break;43     }44 }
      
     

p376.8

1 #include
     
       2 #include
      
        3 #define LEN 40 4 int main(int argc, char *argv[]) 5 { 6     FILE *fp, *fc, *fd[LEN]; 7     char name1[LEN], name2[LEN]; 8     int ch, bp, count[2]={
   0}, i, num[LEN]={
   0}; 9     if(argc==2){10         puts("enter file1 name");11         if((fp=fopen(gets(name1), "r"))==NULL)12             fputs("can't open", stderr);13         puts("enter file1 name");14         if((fc=fopen(gets(name2), "r"))==NULL)15             fputs("can't open", stderr);16 17         while((ch=getc(fp))!=EOF)18             if(ch==argv[1][0])19                 count[0]++;20         while((bp=getc(fc))!=EOF)21             if(bp==argv[1][0])22                 count[1]++;23         24         printf("%s has %d %c\n", name1, count[0], *argv[1]);25         printf("%s has %d %c\n", name2, count[1], *argv[1]);26     }27 28     for(i=2; i
      
     

p376.10

1 #include
     
       2 #include
      
        3 #define LEN 40 4 int main(void) 5 { 6     FILE *fp; 7     char name[LEN]; 8     long offset; 9     int ch;10 11     puts("enter the file name");12     if((fp=fopen(gets(name), "r"))==NULL){13         fprintf(stderr, "can't open\n");14         exit(1);15     }16     puts("enter an offset of file(q to quit)");17     while(scanf("%ld", &offset)==1){18         fseek(fp, offset, SEEK_SET);19         while(((ch=getc(fp))!='\n')&&ch!=EOF&&ch!='\r')20             fprintf(stdout, "%c", ch);21         if(ch==EOF)22             exit;23         printf("\n");24         puts("enter an offset of file(q to quit)");25     }26 27     fclose(fp);28     system("pause");29     return 0;30 }