Question

高分悬赏3题简单C语言编程题

1 统计字母、数字和字符
统计一个文本文件中字母、数字及其他字符各有多少个。

2 删除注释
将一个C 语言源程序文件中所有注释去掉后，存入另一个文件。

3文件合并
文本文件a1.txt 和a2.txt 中包含若干从小到大排过序的整数，现要求把两个文件中的数据合起来，仍按从小到大顺序写入文件a3.txt 中，试编写相应程序。

Answer 1

太简单了~

#include "stdio.h"
#include "conio.h"

main()
{
FILE *fp;

fp=fopen("text1.txt","r");
char ch;
int totalnum =0;
int totalwords =0;
while(ch!=EOF)
{
ch=fgetc(fp);
if(((ch>='A')&&(ch<='Z'))||((ch>='a')&&(ch<='z')))
{
totalwords++;
}
else if((ch>='0')&&(ch<='9'))
{
totalnum++;
}

}
printf("totalwords : %d\n",totalwords);
printf("totalnum :%d\n",totalnum);

fclose(fp);
}

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAX_LINE 1000
#define RMV "/* XXXXX */"

int main()
{
char sLine[MAX_LINE];
char *pPos;

freopen("exam.c","rb",stdin);
freopen("exam.out","wb",stdout);
while (gets(sLine))
{
while (pPos = strstr(sLine,RMV))
{
*pPos = '\0';
strcat(sLine,pPos+strlen(RMV));
}
puts(sLine);
}
return 0;
}

#include<stdio.h>

void main()
{
FILE *f1,*f2,*f3;
int a,b;
f1=fopen("a1.txt","r");
f2=fopen("a2.txt","r");
f3=fopen("a3.txt","w");

//a=getw(f1);
fscanf(f1,"%d",&a);
//b=getw(f2);
fscanf(f2,"%d",&b);

while(!feof(f1)&&!feof(f2)) //两个文件都没结束时，执行循环、比较
{
if(a<=b){
fprintf(f3,"%d ",a);
fscanf(f1,"%d",&a);
}else{
fprintf(f3,"%d ",b);
fscanf(f2,"%d",&b);
}
}

if(feof(f1)) //文件a1.txt结束时，把a2.txt中的数全部输入a3.txt
{
if(a<=b){
fprintf(f3,"%d ",a);
fprintf(f3,"%d ",b);
}else{
fprintf(f3,"%d ",b);
fprintf(f3,"%d ",a);
}
while(!feof(f2)){
fscanf(f2,"%d",&b);
fprintf(f3,"%d ",b);
}
}
else if(feof(f2))
{
if(a<=b){
fprintf(f3,"%d ",a);
fprintf(f3,"%d ",b);
}else{
fprintf(f3,"%d ",b);
fprintf(f3,"%d ",a);
}
while(!feof(f1)){
fscanf(f1,"%d",&a);
fprintf(f3,"%d ",a);
}
}

fclose(f1);
fclose(f2);
fclose(f3);
printf("已完成!\n");

}