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#include <stdio.h>
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#include <string.h>
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#include <arpa/inet.h>
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uint32_t ip2uint(const char *ip) {
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int a, b, c, d;
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uint32_t addr = 0;
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if (sscanf(ip, "%d.%d.%d.%d", &a, &b, &c, &d) != 4)
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return 0;
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addr = a << 24;
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addr |= b << 16;
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addr |= c << 8;
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addr |= d;
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return addr;
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}
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int main()
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{
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printf("%u
", ip2uint("0.0.0.0"));
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printf("%u
", ip2uint("1.0.0.1"));
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printf("%u
", ip2uint("222.202.55.66"));
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printf("%u
", ip2uint("255.255.255.255"));
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FILE *fp1;
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char c;
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fp1= fopen ("ctrl.txt", "r");
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c = fgetc(fp1);
- printf("%c ", c);
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fclose(fp1);
- }
[root@localhost 桌面]# gcc tmp.c -o tmp
[root@localhost 桌面]# ./tmp
0
16777217
3737794370
4294967295
[root@localhost 桌面]#
<script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script>
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