43 lines
779 B
C
43 lines
779 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int main(int argc, char **argv)
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{
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FILE *fp;
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char *linebuf;
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size_t linesize;
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if (argc < 2)
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{
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fprintf(stderr, "Usage...\n");
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exit(1);
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}
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fp = fopen(argv[1], "r");
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if (NULL == fp)
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{
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perror("fopen()");
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exit(1);
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}
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// !!!
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linebuf = NULL;
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linesize = 0;
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while (1)
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{
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if (getline(&linebuf, &linesize, fp) < 0)
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break;
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printf("%d\n", strlen(linebuf));
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printf("%d\n", linesize);
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// 此时输出linesize值不对，是因为没有初始化
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// 修改后发现，linesize初始值就是120，是后面不够再增加
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}
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// !!!
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free(linebuf);
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fclose(fp);
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exit(0);
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} |