#include<stdio.h>
int main(int argc,char *argv[]){
        if(argc!=2){
        fprintf(stderr,"usage:%s filename\n",argv[0]);
        exit(1);
        }

        FILE *f1;
        char a1[3][3];

        f1=fopen(argv[1],"r");
        if(f1==NULL){
        fprintf(stderr,"%s: file no found\n",argv[1]);
        exit(1);
        }

        char *str1=(char *)malloc(100);
        int i=0,ret;
        while(fgets(str1,100,f1)!=NULL){
        if((ret=sscanf(str1,"%s %s %s",&a1[i][0],&a1[i][1],&a1[i][2]))<3){
        fprintf(stderr,"sscanf() call error,ret=%d\n",ret);
        exit(1);
        }
        i++;
        }

          for(i=0;i<3;i++){
                fprintf(stdout,"%s %s %s\n",a1[i][0],a1[i][1],a1[i][2]);
          }
        exit(0);
}

[view@localhost c]$cat 1.txt
1 a b
2 c d
3 e f
[view@localhost c]$cc -o test1 test1.c
[view@localhost c]$./test1 1.txt
Segmentation fault (core dumped)
(gdb) where
#0  0x005dfc7b in strlen () from /lib/tls/libc.so.6
#1  0x005b4155 in vfprintf () from /lib/tls/libc.so.6
#2  0x005b940f in fprintf () from /lib/tls/libc.so.6
#3  0x08048671 in main ()
(gdb)


[ 本帖最后由 khaz 于 2011-4-23 15:11 编辑 ]

你怎么能往 char 里面读 string 呢？

有道理，可是程序应该怎么改呢？对了 文件1.txt里的值是特例 1.txt是可以有字符串的

[ 本帖最后由 khaz 于 2011-4-23 15:24 编辑 ]

#include<stdio.h>
int main(int argc,char *argv[]){
  if(argc!=2){
    fprintf(stderr,"usage:%s filename\n",argv[0]);
    exit(1);
  }
  FILE *f1;
  char a1[3][3];
  f1=fopen(argv[1],"r");
  if(f1==NULL){
    fprintf(stderr,"%s: file no found\n",argv[1]);
    exit(1);
  }
  char *str1=(char *)malloc(100);
  int i=0,ret;
  while(fgets(str1,100,f1)!=NULL){
    printf ("%s\n", str1);
    if((ret=sscanf(str1,"%s %s %s",&a1[i][0],&a1[i][1],&a1[i][2]))<3){
      fprintf(stderr,"sscanf() call error,ret=%d\n",ret);
      exit(1);
    }
    i++;
  }
  for(i=0;i<3;i++){
    // 这句输出字符,应该使用%c
    fprintf(stdout,"%c %c %c\n",a1[i][0],a1[i][1],a1[i][2]);
  }
  exit(0);
}

for(i=0;i<3;i++){
    // 这句输出字符,应该使用%c
    fprintf(stdout,"%c %c %c\n",a1[i][0],a1[i][1],a1[i][2]);
  }
 

解决了 谢谢voidx提醒 红色是增加和修改的地方。
#include<stdio.h>
int main(int argc,char *argv[]){
        if(argc!=2){
        fprintf(stderr,"usage:%s filename\n",argv[0]);
        exit(1);
        }

        FILE *f1;
        char *a1[3][3];
        int k,m;
        for(k=0;k<3;k++)
                for(m=0;m<3;m++){
        a1[k][m]=(char *)malloc(10);
        }

        f1=fopen(argv[1],"r");
        if(f1==NULL){
        fprintf(stderr,"%s: file no found\n",argv[1]);
        exit(1);
        }

        char *str1=(char *)malloc(100);
        int i=0,ret;
        while(fgets(str1,100,f1)!=NULL){
        if((ret=sscanf(str1,"%s %s %s",a1[i][0],a1[i][1],a1[i][2]))<3){
        fprintf(stderr,"sscanf() call error,ret=%d\n",ret);
        exit(1);
        }
        i++;
        }

          for(i=0;i<3;i++){
                fprintf(stdout,"%s %s %s\n",a1[i][0],a1[i][1],a1[i][2]);
          }
        exit(0);
}
[view@localhost c]$cc -o test1 test1.c
[view@localhost c]$./test1 1.txt
1 a b
2 c d
3 e f


[ 本帖最后由 khaz 于 2011-4-23 15:35 编辑 ]

4楼的 我的文件1.txt是可以有2个字母以上的单词的，所以程序还是要把文件中的内容当作字符串来看。不过还是谢谢了