程序设计3

#include
#include

int main()
{
    char program[300];
    FILE *fp1,*fp2;
    if(fp1=fopen("source.c","r")==NULL)
    {
        printf("Cannot open file");
        exit(1);
    }
    if(fp2=fopen("newsource.c","w+"))
    {
        printf("Cannot build newfile");
        exit(1);
    }
    int m,n;
    printf("请输入您要改为注释的代码行数");
    scanf("%d %d",&m,&n);
    int line=0;
    while(!feof(fp1))
    {
        line++;
        if(line>m&&line<(m+n))
        {
            fputc('/',fp2);
            fputc('/',fp2);
        }
        fputs(program,fp2);
        fgets(program,300,fp1);
    }
    rewind(fp2);
    printf("经过处理后的源程序是\n");
    n=0;
    fgets(program,300,fp2);
    while (!feof(fp2))
    {

        printf("%d\t%s", n, program);
        n++;
        fgets(program,300,fp2);
    }
    fclose(fp1);
    fclose(fp2);
    return 0;
}