lineno.c

用Ｃ语言编的邮件系统（毕业论文）

#include<stdio.h>
#define MAXLINE 200

int main(int argc,char **argv)
{
    FILE *sf,*df;
    char buf[MAXLINE];
    int i=375;
    if (argc!=3) {
        printf("Usage:./lineno <source file> <destination file>");
        return 0;
    }
    sf=fopen(argv[1],"r");
    df=fopen(argv[2],"w");
    while(fgets(buf,MAXLINE,sf))
        fprintf(df,"%d   %s",i++,buf);
    fclose(sf);
    fclose(df);
    return 1;
}