1、首先打开VC++6.0
2、选择文件，新建
3、选择C++ source file 新建一个空白文档
4、声明头文件#include<stdio.h>#include<stdlib.h>#include<string.h>
5、写一个函数用于输出文件内容void OutputFile(FILE *fp){char ch;while((ch=fgetc(fp))!=EOF)putchar(ch);}
6、文件信息合并函数void MergeFile(F诔罨租磊ILE *s1fp,FILE *s2fp,FILE *dfp,int *num){char ch1,艘早祓胂ch2;/*初始化ch1和ch2为文件的首字符*/ch1=fgetc(s1fp); ch2=fgetc(s2fp); /*从文件中读取字符，直到有一个文件结束*/ while((ch1!=EOF)&&(ch2!=EOF)) /*进行字符的比较*/ if(ch1<=ch2) { fputc(ch1,dfp); /*字符数增加1*/ *num=*num+1; ch1=fgetc(s1fp); } else { fputc(ch2,dfp); /*字符数增加1*/ *num=*num+1; ch2=fgetc(s2fp); } /*如果文件s1fp结束，则将文件s2fp的剩余内容写入到文件dfp*/ if(ch1==EOF) while((ch2=fgetc(s2fp))!=EOF) { fputc(ch2,dfp); /*字符数增加1*/ *num=*num+1; } /*如果文件s2fp结束，则将文件s1fp的剩余内容写入到文件dfp*/ else while((ch1=fgetc(s1fp))!=EOF) { fputc(ch1,dfp); /*字符数增加1*/ *num=*num+1; }}
7、主函数void main猾诮沓靥(){char s1filename[20],s2filename[20],dfilename[20];FILE *s1fp,*s2fp,*dfp;int num=0;/*得到第一个文件的文件名*/ printf("Please input source1 filename:\n"); gets(s1filename); /*得到另一个文件的文件名*/ printf("Please input source2 filename:\n"); gets(s2filename); /*得到要目标文件的文件名*/printf("Please input destination filename:\n");gets(dfilename);/*输出信息合并前的文件的内容*/if((s1fp=fopen(s1filename,"r"))==0){printf("Can't open the file :%s\n",s1filename);exit(0);}if((s2fp=fopen(s2filename,"r"))==0){printf("Can't open the file :%s\n",s2filename);exit(0);}if((dfp=fopen(dfilename,"w+"))==0){ printf("Can't open or create the file :%s\n",dfilename); exit(0); } /*输出信息合并前文件的内容*/ printf("\nThe text of the file %s before merging :\n",s1filename); OutputFile(s1fp);printf("\nThe text of the file %s before merging :\n",s2filename); OutputFile(s2fp); fseek(s2fp,0L,SEEK_SET); fseek(s1fp,0L,SEEK_SET); /*信息合并*/ MergeFile(s1fp,s2fp,dfp,&num); /*输出信息合并后文件的内容*/ printf("\nThe text of the file %s after merging :\n",dfilename); fseek(dfp,0L,SEEK_SET);OutputFile(dfp);/*输出总的字符数*/printf("\nand the file %s has %d chars\n",dfilename,num); fclose(s1fp); fclose(s2fp); fclose(dfp); getch(); //return 0;}
