{"id":8136,"date":"2022-09-12T02:42:57","date_gmt":"2022-09-11T21:12:57","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-need-algorithm-to-solve-shifting-in-c-closed\/"},"modified":"2022-09-12T02:42:57","modified_gmt":"2022-09-11T21:12:57","slug":"solved-need-algorithm-to-solve-shifting-in-c-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-need-algorithm-to-solve-shifting-in-c-closed\/","title":{"rendered":"[Solved] Need algorithm to solve shifting in C [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-17886258\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"17886258\" data-parentid=\"17880175\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>like this (error handling is omitted, strtok_r removed if strtok_r can use):<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;string.h&gt;\n\nchar *strtok_r(char *str, const char *delims, char **store){\n    char *p, *wk;\n    if(str != NULL){\n        *store = str;\n    }\n    if(*store == NULL) return NULL;\n    *store += strspn(*store, delims);\/\/skip delimiter\n    if(**store == '\\0') return NULL;\n    p=strpbrk(wk=*store, delims);\n    if(p != NULL){\n        *p='\\0';\n        *store = p + 1;\n    } else {\n        *store = NULL;\n    }\n    return wk;\n}\n\n#define SHIFT_KEYWORD \"shift_value\"\n\ntypedef struct pair {\n    char *key;\n    int  val;\n} Pair;\n\nint cmp(Pair *a, Pair *b){\n    return strcmp(a-&gt;key, b-&gt;key);\n}\n\nPair *parse_command(const char *commands, int *num_cmd){\n    char *pc, *cmd = strdup(commands);\n\n    if(NULL!=(pc = strtok(cmd, \" \")) &amp;&amp; strcmp(pc, \"-shift\")!=0){\n        fprintf(stderr, \"command format error!\\n\");\n        *num_cmd = 0;\n        free(cmd);\n        return NULL;\n    }\n    char *p;\n    pc = strtok(NULL, \" \");\n    *num_cmd=1;\n    for(p=pc;NULL!=(p=strchr(p, ':'));++p){\n        ++*num_cmd;\/\/count command\n    }\n    Pair *cmds = calloc(*num_cmd, sizeof(Pair));\n    int c = 0;\n    char *pr1, *pr2;\n    for(p = pc;NULL!=(p=strtok_r(p, \":\", &amp;pr1));p=NULL){\n        const int len = sizeof(SHIFT_KEYWORD)-1;\n        for(;NULL!=(p=strtok_r(p, \"=\", &amp;pr2));p=NULL){\n            if(strncmp(p, SHIFT_KEYWORD, len)==0)\n                cmds[c++].val = atoi(p + len);\n            else\n                cmds[c].key = strdup(p);\n        }\n    }\n    qsort(cmds, *num_cmd, sizeof(Pair), (int (*)(const void*,const void*))cmp);\n    free(cmd);\n    return cmds;\n}\n\nint count_element(FILE *fp){\n    int ch, count =0;\n    while(EOF!=(ch=fgetc(fp))){\n        if(ch == '=')\n            ++count;\n    }\n    rewind(fp);\n    return count;\n}\n\ntypedef struct vec {\n    int value;\n    Pair pair;\n} Vec;\n\nint cmpv(const void *x, const void *y){\n    Vec *a = (Vec*)x;\n    Vec *b = (Vec*)y;\n    return a-&gt;value != b-&gt;value ? a-&gt;value - b-&gt;value : strcmp(a-&gt;pair.key, b-&gt;pair.key);\n}\n\nint main(void){\n    const char *command =\"-shift p100=shift_value15:p5=shift_value4:p7=shift_value2\";\n    int num_cmd;\n    Pair *cmd_list;\n\n    cmd_list=parse_command(command, &amp;num_cmd);\n\n    FILE *fp=fopen(\"a.txt\",\"r\");\n    int num_vec = count_element(fp);\n    Vec v[num_vec];\n    char buff[1024];\n    int c=0;\n    while(fgets(buff, sizeof(buff), fp)){\n        char *p;\n        int value;\n        p=strtok(buff, \" \\n\");\n        if(*p == '#')\n            value = atoi(p+1);\n        else {\n            fprintf(stderr, \"data format error\\n\");\n            exit(1);\n        }\n        for(;NULL!=(p=strtok(NULL, \" \\n\"));++c){\n            Pair *cmd;\n            char *pr, *key;\n            int event;\n            pr=strchr(p, '=');\n            *pr=\"\\0\";\n            key = strdup(p);\n            event = atoi(pr+1);\n            v[c].value = value;\n            v[c].pair.key = key;\n            v[c].pair.val = event;\n            cmd = bsearch(&amp;v[c].pair, cmd_list, num_cmd, sizeof(Pair), (int (*)(const void*,const void*))cmp);\n            if(cmd){\n                v[c].value = value + cmd-&gt;val;\n            }\n        }\n    }\n    fclose(fp);\n    qsort(v, num_vec, sizeof(Vec), cmpv);\n\n    \/\/stdout -&gt; fp = fopen(\"a.txt\", \"w\");\n    int i, pre_value=-1;\n    for(i=0;i&lt;num_vec;++i){\n        if(pre_value != v[i].value){\n            if(pre_value!=-1)\n                fprintf(stdout, \"\\n\");\n            fprintf(stdout, \"#%-2d\", pre_value=v[i].value);\n        }\n        fprintf(stdout, \" %s=%d\", v[i].pair.key, v[i].pair.val);\n        free(v[i].pair.key);\n    }\n    for(i=0;i&lt;num_cmd;++i){\n        free(cmd_list[i].key);\n    }\n    free(cmd_list);\n    return 0;\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">1<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Need algorithm to solve shifting in C [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] like this (error handling is omitted, strtok_r removed if strtok_r can use): #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; char *strtok_r(char *str, const char *delims, char **store){ char *p, *wk; if(str != NULL){ *store = str; } if(*store == NULL) return NULL; *store += strspn(*store, delims);\/\/skip delimiter if(**store == &#8216;\\0&#8217;) return NULL; p=strpbrk(wk=*store, delims); if(p &#8230; <a title=\"[Solved] Need algorithm to solve shifting in C [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-need-algorithm-to-solve-shifting-in-c-closed\/\" aria-label=\"More on [Solved] Need algorithm to solve shifting in C [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324],"class_list":["post-8136","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Need algorithm to solve shifting in C [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-need-algorithm-to-solve-shifting-in-c-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Need algorithm to solve shifting in C [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] like this (error handling is omitted, strtok_r removed if strtok_r can use): #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; char *strtok_r(char *str, const char *delims, char **store){ char *p, *wk; if(str != NULL){ *store = str; } if(*store == NULL) return NULL; *store += strspn(*store, delims);\/\/skip delimiter if(**store == &#039;&#039;) return NULL; p=strpbrk(wk=*store, delims); if(p ... 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