请教一个关于26个字母枚举的问题 请教下,如何用26个字母枚举出由它们组合的所有四字符的组合和五字符的组合? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 $a = array();for($i = 97; $i < 123; $i++){ $a[] = chr($i);}$c = array();for($i = 0; $i < 26; $i++){ if($i + 4 < 26){ for($j = $i + 1; $j < 24; $j++){ $b = array(); $b[] = $a[$i]; $b[] = $a[$j]; $b[] = $a[$j + 1]; $b[] = $a[$j + 2]; $c[] = implode(',', $b); continue; } }}echo '<pre>';print_r($c);/*Array( [0] => a,b,c,d [1] => a,c,d,e [2] => a,d,e,f [3] => a,e,f,g [4] => a,f,g,h [5] => a,g,h,i [6] => a,h,i,j [7] => a,i,j,k [8] => a,j,k,l [9] => a,k,l,m [10] => a,l,m,n [11] => a,m,n,o [12] => a,n,o,p [13] => a,o,p,q [14] => a,p,q,r [15] => a,q,r,s [16] => a,r,s,t [17] => a,s,t,u [18] => a,t,u,v [19] => a,u,v,w [20] => a,v,w,x [21] => a,w,x,y [22] => a,x,y,z [23] => b,c,d,e [24] => b,d,e,f [25] => b,e,f,g [26] => b,f,g,h [27] => b,g,h,i [28] => b,h,i,j [29] => b,i,j,k [30] => b,j,k,l [31] => b,k,l,m [32] => b,l,m,n [33] => b,m,n,o [34] => b,n,o,p [35] => b,o,p,q [36] => b,p,q,r [37] => b,q,r,s [38] => b,r,s,t [39] => b,s,t,u [40] => b,t,u,v [41] => b,u,v,w [42] => b,v,w,x [43] => b,w,x,y [44] => b,x,y,z [45] => c,d,e,f [46] => c,e,f,g [47] => c,f,g,h [48] => c,g,h,i [49] => c,h,i,j [50] => c,i,j,k [51] => c,j,k,l [52] => c,k,l,m [53] => c,l,m,n [54] => c,m,n,o [55] => c,n,o,p [56] => c,o,p,q [57] => c,p,q,r [58] => c,q,r,s [59] => c,r,s,t [60] => c,s,t,u [61] => c,t,u,v [62] => c,u,v,w [63] => c,v,w,x [64] => c,w,x,y [65] => c,x,y,z [66] => d,e,f,g [67] => d,f,g,h [68] => d,g,h,i [69] => d,h,i,j [70] => d,i,j,k [71] => d,j,k,l [72] => d,k,l,m [73] => d,l,m,n [74] => d,m,n,o [75] => d,n,o,p [76] => d,o,p,q [77] => d,p,q,r [78] => d,q,r,s [79] => d,r,s,t [80] => d,s,t,u [81] => d,t,u,v [82] => d,u,v,w [83] => d,v,w,x [84] => d,w,x,y [85] => d,x,y,z [86] => e,f,g,h [87] => e,g,h,i [88] => e,h,i,j [89] => e,i,j,k [90] => e,j,k,l [91] => e,k,l,m [92] => e,l,m,n [93] => e,m,n,o [94] => e,n,o,p [95] => e,o,p,q [96] => e,p,q,r [97] => e,q,r,s [98] => e,r,s,t [99] => e,s,t,u [100] => e,t,u,v [101] => e,u,v,w [102] => e,v,w,x [103] => e,w,x,y [104] => e,x,y,z [105] => f,g,h,i [106] => f,h,i,j [107] => f,i,j,k [108] => f,j,k,l [109] => f,k,l,m [110] => f,l,m,n [111] => f,m,n,o [112] => f,n,o,p [113] => f,o,p,q [114] => f,p,q,r [115] => f,q,r,s [116] => f,r,s,t [117] => f,s,t,u [118] => f,t,u,v [119] => f,u,v,w [120] => f,v,w,x [121] => f,w,x,y [122] => f,x,y,z [123] => g,h,i,j [124] => g,i,j,k [125] => g,j,k,l [126] => g,k,l,m [127] => g,l,m,n [128] => g,m,n,o [129] => g,n,o,p [130] => g,o,p,q [131] => g,p,q,r [132] => g,q,r,s [133] => g,r,s,t [134] => g,s,t,u [135] => g,t,u,v [136] => g,u,v,w [137] => g,v,w,x [138] => g,w,x,y [139] => g,x,y,z [140] => h,i,j,k [141] => h,j,k,l [142] => h,k,l,m [143] => h,l,m,n [144] => h,m,n,o [145] => h,n,o,p [146] => h,o,p,q [147] => h,p,q,r [148] => h,q,r,s [149] => h,r,s,t [150] => h,s,t,u [151] => h,t,u,v [152] => h,u,v,w [153] => h,v,w,x [154] => h,w,x,y [155] => h,x,y,z [156] => i,j,k,l [157] => i,k,l,m [158] => i,l,m,n [159] => i,m,n,o [160] => i,n,o,p [161] => i,o,p,q [162] => i,p,q,r [163] => i,q,r,s [164] => i,r,s,t [165] => i,s,t,u [166] => i,t,u,v [167] => i,u,v,w [168] => i,v,w,x [169] => i,w,x,y [170] => i,x,y,z [171] => j,k,l,m [172] => j,l,m,n [173] => j,m,n,o [174] => j,n,o,p [175] => j,o,p,q [176] => j,p,q,r [177] => j,q,r,s [178] => j,r,s,t [179] => j,s,t,u [180] => j,t,u,v [181] => j,u,v,w [182] => j,v,w,x [183] => j,w,x,y [184] => j,x,y,z [185] => k,l,m,n [186] => k,m,n,o [187] => k,n,o,p [188] => k,o,p,q [189] => k,p,q,r [190] => k,q,r,s [191] => k,r,s,t [192] => k,s,t,u [193] => k,t,u,v [194] => k,u,v,w [195] => k,v,w,x [196] => k,w,x,y [197] => k,x,y,z [198] => l,m,n,o [199] => l,n,o,p [200] => l,o,p,q [201] => l,p,q,r [202] => l,q,r,s [203] => l,r,s,t [204] => l,s,t,u [205] => l,t,u,v [206] => l,u,v,w [207] => l,v,w,x [208] => l,w,x,y [209] => l,x,y,z [210] => m,n,o,p [211] => m,o,p,q [212] => m,p,q,r [213] => m,q,r,s [214] => m,r,s,t [215] => m,s,t,u [216] => m,t,u,v [217] => m,u,v,w [218] => m,v,w,x [219] => m,w,x,y [220] => m,x,y,z [221] => n,o,p,q [222] => n,p,q,r [223] => n,q,r,s [224] => n,r,s,t [225] => n,s,t,u [226] => n,t,u,v [227] => n,u,v,w [228] => n,v,w,x [229] => n,w,x,y [230] => n,x,y,z [231] => o,p,q,r [232] => o,q,r,s [233] => o,r,s,t [234] => o,s,t,u [235] => o,t,u,v [236] => o,u,v,w [237] => o,v,w,x [238] => o,w,x,y [239] => o,x,y,z [240] => p,q,r,s [241] => p,r,s,t [242] => p,s,t,u [243] => p,t,u,v [244] => p,u,v,w [245] => p,v,w,x [246] => p,w,x,y [247] => p,x,y,z [248] => q,r,s,t [249] => q,s,t,u [250] => q,t,u,v [251] => q,u,v,w [252] => q,v,w,x [253] => q,w,x,y [254] => q,x,y,z [255] => r,s,t,u [256] => r,t,u,v [257] => r,u,v,w [258] => r,v,w,x [259] => r,w,x,y [260] => r,x,y,z [261] => s,t,u,v [262] => s,u,v,w [263] => s,v,w,x [264] => s,w,x,y [265] => s,x,y,z [266] => t,u,v,w [267] => t,v,w,x [268] => t,w,x,y [269] => t,x,y,z [270] => u,v,w,x [271] => u,w,x,y [272] => u,x,y,z [273] => v,w,x,y [274] => v,x,y,z)*/不知道答案对不对,呵呵 本帖最后由 xuzuning 于 2011-07-12 17:36:40 编辑 question2answer 注册是怎么实现的? snoopy一个bug 《锋利的jQuery》中的get1.php get2.php 新手问如何比较大小 PHP ADODB连接oracle 主机字符串的问题 服务器任务管理器cpu使用过高的问题 想做个新闻系统,打算用longblob存放正文,但似乎无法输入表格,高分求教! PHP的图象函数不能用,是不是要到哪里下载附加文件? 誰有用php連接informix數據庫的?快來幫幫我啊!! php文件下载 能和php,js交互的最好的数据格式是xml吗? 函数分析求助
for($i = 97; $i < 123; $i++){
$a[] = chr($i);
}
$c = array();
for($i = 0; $i < 26; $i++){
if($i + 4 < 26){
for($j = $i + 1; $j < 24; $j++){
$b = array();
$b[] = $a[$i];
$b[] = $a[$j];
$b[] = $a[$j + 1];
$b[] = $a[$j + 2];
$c[] = implode(',', $b);
continue;
}
}
}
echo '<pre>';print_r($c);
/*
Array
(
[0] => a,b,c,d
[1] => a,c,d,e
[2] => a,d,e,f
[3] => a,e,f,g
[4] => a,f,g,h
[5] => a,g,h,i
[6] => a,h,i,j
[7] => a,i,j,k
[8] => a,j,k,l
[9] => a,k,l,m
[10] => a,l,m,n
[11] => a,m,n,o
[12] => a,n,o,p
[13] => a,o,p,q
[14] => a,p,q,r
[15] => a,q,r,s
[16] => a,r,s,t
[17] => a,s,t,u
[18] => a,t,u,v
[19] => a,u,v,w
[20] => a,v,w,x
[21] => a,w,x,y
[22] => a,x,y,z
[23] => b,c,d,e
[24] => b,d,e,f
[25] => b,e,f,g
[26] => b,f,g,h
[27] => b,g,h,i
[28] => b,h,i,j
[29] => b,i,j,k
[30] => b,j,k,l
[31] => b,k,l,m
[32] => b,l,m,n
[33] => b,m,n,o
[34] => b,n,o,p
[35] => b,o,p,q
[36] => b,p,q,r
[37] => b,q,r,s
[38] => b,r,s,t
[39] => b,s,t,u
[40] => b,t,u,v
[41] => b,u,v,w
[42] => b,v,w,x
[43] => b,w,x,y
[44] => b,x,y,z
[45] => c,d,e,f
[46] => c,e,f,g
[47] => c,f,g,h
[48] => c,g,h,i
[49] => c,h,i,j
[50] => c,i,j,k
[51] => c,j,k,l
[52] => c,k,l,m
[53] => c,l,m,n
[54] => c,m,n,o
[55] => c,n,o,p
[56] => c,o,p,q
[57] => c,p,q,r
[58] => c,q,r,s
[59] => c,r,s,t
[60] => c,s,t,u
[61] => c,t,u,v
[62] => c,u,v,w
[63] => c,v,w,x
[64] => c,w,x,y
[65] => c,x,y,z
[66] => d,e,f,g
[67] => d,f,g,h
[68] => d,g,h,i
[69] => d,h,i,j
[70] => d,i,j,k
[71] => d,j,k,l
[72] => d,k,l,m
[73] => d,l,m,n
[74] => d,m,n,o
[75] => d,n,o,p
[76] => d,o,p,q
[77] => d,p,q,r
[78] => d,q,r,s
[79] => d,r,s,t
[80] => d,s,t,u
[81] => d,t,u,v
[82] => d,u,v,w
[83] => d,v,w,x
[84] => d,w,x,y
[85] => d,x,y,z
[86] => e,f,g,h
[87] => e,g,h,i
[88] => e,h,i,j
[89] => e,i,j,k
[90] => e,j,k,l
[91] => e,k,l,m
[92] => e,l,m,n
[93] => e,m,n,o
[94] => e,n,o,p
[95] => e,o,p,q
[96] => e,p,q,r
[97] => e,q,r,s
[98] => e,r,s,t
[99] => e,s,t,u
[100] => e,t,u,v
[101] => e,u,v,w
[102] => e,v,w,x
[103] => e,w,x,y
[104] => e,x,y,z
[105] => f,g,h,i
[106] => f,h,i,j
[107] => f,i,j,k
[108] => f,j,k,l
[109] => f,k,l,m
[110] => f,l,m,n
[111] => f,m,n,o
[112] => f,n,o,p
[113] => f,o,p,q
[114] => f,p,q,r
[115] => f,q,r,s
[116] => f,r,s,t
[117] => f,s,t,u
[118] => f,t,u,v
[119] => f,u,v,w
[120] => f,v,w,x
[121] => f,w,x,y
[122] => f,x,y,z
[123] => g,h,i,j
[124] => g,i,j,k
[125] => g,j,k,l
[126] => g,k,l,m
[127] => g,l,m,n
[128] => g,m,n,o
[129] => g,n,o,p
[130] => g,o,p,q
[131] => g,p,q,r
[132] => g,q,r,s
[133] => g,r,s,t
[134] => g,s,t,u
[135] => g,t,u,v
[136] => g,u,v,w
[137] => g,v,w,x
[138] => g,w,x,y
[139] => g,x,y,z
[140] => h,i,j,k
[141] => h,j,k,l
[142] => h,k,l,m
[143] => h,l,m,n
[144] => h,m,n,o
[145] => h,n,o,p
[146] => h,o,p,q
[147] => h,p,q,r
[148] => h,q,r,s
[149] => h,r,s,t
[150] => h,s,t,u
[151] => h,t,u,v
[152] => h,u,v,w
[153] => h,v,w,x
[154] => h,w,x,y
[155] => h,x,y,z
[156] => i,j,k,l
[157] => i,k,l,m
[158] => i,l,m,n
[159] => i,m,n,o
[160] => i,n,o,p
[161] => i,o,p,q
[162] => i,p,q,r
[163] => i,q,r,s
[164] => i,r,s,t
[165] => i,s,t,u
[166] => i,t,u,v
[167] => i,u,v,w
[168] => i,v,w,x
[169] => i,w,x,y
[170] => i,x,y,z
[171] => j,k,l,m
[172] => j,l,m,n
[173] => j,m,n,o
[174] => j,n,o,p
[175] => j,o,p,q
[176] => j,p,q,r
[177] => j,q,r,s
[178] => j,r,s,t
[179] => j,s,t,u
[180] => j,t,u,v
[181] => j,u,v,w
[182] => j,v,w,x
[183] => j,w,x,y
[184] => j,x,y,z
[185] => k,l,m,n
[186] => k,m,n,o
[187] => k,n,o,p
[188] => k,o,p,q
[189] => k,p,q,r
[190] => k,q,r,s
[191] => k,r,s,t
[192] => k,s,t,u
[193] => k,t,u,v
[194] => k,u,v,w
[195] => k,v,w,x
[196] => k,w,x,y
[197] => k,x,y,z
[198] => l,m,n,o
[199] => l,n,o,p
[200] => l,o,p,q
[201] => l,p,q,r
[202] => l,q,r,s
[203] => l,r,s,t
[204] => l,s,t,u
[205] => l,t,u,v
[206] => l,u,v,w
[207] => l,v,w,x
[208] => l,w,x,y
[209] => l,x,y,z
[210] => m,n,o,p
[211] => m,o,p,q
[212] => m,p,q,r
[213] => m,q,r,s
[214] => m,r,s,t
[215] => m,s,t,u
[216] => m,t,u,v
[217] => m,u,v,w
[218] => m,v,w,x
[219] => m,w,x,y
[220] => m,x,y,z
[221] => n,o,p,q
[222] => n,p,q,r
[223] => n,q,r,s
[224] => n,r,s,t
[225] => n,s,t,u
[226] => n,t,u,v
[227] => n,u,v,w
[228] => n,v,w,x
[229] => n,w,x,y
[230] => n,x,y,z
[231] => o,p,q,r
[232] => o,q,r,s
[233] => o,r,s,t
[234] => o,s,t,u
[235] => o,t,u,v
[236] => o,u,v,w
[237] => o,v,w,x
[238] => o,w,x,y
[239] => o,x,y,z
[240] => p,q,r,s
[241] => p,r,s,t
[242] => p,s,t,u
[243] => p,t,u,v
[244] => p,u,v,w
[245] => p,v,w,x
[246] => p,w,x,y
[247] => p,x,y,z
[248] => q,r,s,t
[249] => q,s,t,u
[250] => q,t,u,v
[251] => q,u,v,w
[252] => q,v,w,x
[253] => q,w,x,y
[254] => q,x,y,z
[255] => r,s,t,u
[256] => r,t,u,v
[257] => r,u,v,w
[258] => r,v,w,x
[259] => r,w,x,y
[260] => r,x,y,z
[261] => s,t,u,v
[262] => s,u,v,w
[263] => s,v,w,x
[264] => s,w,x,y
[265] => s,x,y,z
[266] => t,u,v,w
[267] => t,v,w,x
[268] => t,w,x,y
[269] => t,x,y,z
[270] => u,v,w,x
[271] => u,w,x,y
[272] => u,x,y,z
[273] => v,w,x,y
[274] => v,x,y,z
)
*/
不知道答案对不对,呵呵