以下是引用威神在2010-12-26 20:55:32的发言：

用清屏函数，修改ASCII码后再输出

以下是引用m21wo在2010-12-26 21:42:15的发言：

#include
#include
int main()
{
 
    char c;
    char filename[80];
    char temp[1000];
    FILE *fp;
    printf("Please input file path:");
    gets(filename);
    if((fp=fopen(filename,"r+"))==NULL)
    {
        printf("file %s can't opened \n",filename);
        exit(0);
    }
    int i=0;
    while((c=fgetc(fp))!=EOF)
    {
        //c='a'<=c&&c<='z'?c-'a'+'A':c;
        if((c>='a')&&(c<='z'))
            c=c-'a'+'A';
        temp=c;
        i++;
        //fputc(c,fp);
    }
    fclose(fp);
    fp=fopen(filename,"w+");
    int j=0;
    while(j