如何用C语言将文本文件中内容读入程序，并按照第二列的数据进行从大到小排序。 用c语言如何读入并使文本文件按某一列排序输出?
c\u8bed\u8a00\u8bfb\u53d6\u6587\u4ef6\u4e00\u5217 \u6587\u4ef6\u4ee5\u67d0\u5217\u7684\u6570\u636e\u6309\u5927\u5c0f\u6392\u52171.\u7528fgets\u51fd\u6570\u53ef\u4ee5\u8bfb\u53d6\u6587\u4ef6\u4e2d\u67d0\u884c\u7684\u6570\u636e\uff0c\u67d0\u5217\u6570\u636e\u5c31\u5fc5\u987b\u4e00\u4e2a\u4e00\u4e2a\u8bfb\u5165\u6bcf\u884c\u7684\u7b2c\u51e0\u4e2a\u5b57\u7b26\uff0c\u518d\u5b58\u5165\u5230\u4e00\u4e2a\u5b57\u7b26\u4e32\u5f53\u4e2d\u30022.\u4f8b\u7a0b\uff1a
#include#includevoid main(){ char a[100],b[100],c[100]; int i=3,j=4,k=0; //\u7b2c\u4e09\u884c\uff0c\u7b2c\u56db\u5217 FILE *fp = fopen("data.txt","r"); while(fgets(c,100,fp)){ //\u8bfb\u5165\u6bcf\u884c\u6570\u636e i--; if(i==0) strcpy(a,c); //\u8bfb\u5230\u7b2c\u4e09\u884c\u6570\u636e b[k++]=c[j-1]; //\u628a\u6bcf\u884c\u7684\u90a3\u5217\u5b57\u7b26\u62f7\u5230b\u4e2d } b[k]=0; printf("\u7b2c%d\u884c\u6570\u636e\uff1a%s\n",i,a); printf("\u7b2c%d\u5217\u6570\u636e\uff1a%s\n",j,b); fclose(fp);}3.\u9047\u5230\u6b64\u95ee\u9898\uff0c\u5982\u679c\u6b64\u529f\u80fd\u4e0d\u662f\u5e94\u7528\u8f6f\u4ef6\u7684\u4e00\u90e8\u5206\uff0c\u5219\u53ef\u4ee5\u901a\u8fc7\u6279\u5904\u7406\u7684for\u5faa\u73af\u547d\u4ee4\u6765\u8fdb\u884c\u63d0\u53d6\uff0c\u76f8\u5bf9\u6bd4\u4f7f\u7528c\u8bed\u8a00\u6548\u7387\u3002
\u4f7f\u7528\u6587\u4ef6\u64cd\u4f5c\u51fd\u6570\u6253\u5f00\u6587\u4ef6\uff0c\u8bfb\u53d6\u4fe1\u606f\uff0c\u8fdb\u884c\u6392\u5e8f\uff0c\u91cd\u65b0\u5199\u5165\u5e76\u8986\u76d6\u539f\u6587\u4ef6\u3002
\u4f8b\u7a0b\uff1a
#include #include int comp(const void* a,const void* b){ return *(int*)a-*(int*)b; }int main(){ FILE *p;//\u6587\u4ef6\u6307\u9488 int i,j,a[1000]; p = fopen("\u6587\u4ef6\u540d\u79f0", "r");//\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u4f60\u6587\u4ef6\u8def\u5f84,\u8def\u5f84\u4e2d\u7684\\u8981\u5199\u6210\\,\u6587\u4ef6\u540d\u5fc5\u987b\u5e26\u540e\u7f00 for(i=0;fscanf(p,"%d",a+i)!= EOF;i++);//EOF\u4e3a\u6587\u4ef6\u5c3e(end of file),\u8bfb\u53d6\u6587\u672c\u4e2d\u7684\u6570\u636e qsort(a,i,sizeof(int),comp); //\u7531\u5c0f\u5230\u5927\u6392\u5e8f,\u6bd4\u8f83\u65b9\u5f0f\u7531comp\u51fd\u6570\u6307\u5b9a\u3002 fclose(p); p = fopen("\u6587\u4ef6\u540d\u79f0", "w");//\u4ee5\u5199\u5165\u65b9\u5f0f\u91cd\u65b0\u6253\u5f00 for(j=0;j<i;j++) fprintf(p,"%d ",a[j]);//\u91cd\u65b0\u8f93\u5165\u6392\u5e8f\u540e\u7684\u6570\u636e fclose(p) return 0;}
#include <stdio.h>
#include <string.h>
#include <malloc.h>
typedef struct stt
{
char c1[9];
int c2;
struct stt *next;
}STT;
void readFile(FILE *fp);
void writeFile(FILE *fp);
void printfSTT();//打印链表
void px();//将链表按c2降序排列
STT *sttHead=NULL,*sttTail=NULL;
int main()
{
FILE *fp;
if((fp=fopen("c:\\list.txt","rt+"))==NULL)
{
printf("can't open File!");
exit(1);
}
sttHead=(STT *)malloc(sizeof(STT));
sttHead->next=NULL;
readFile(fp);
printfSTT();
px();
printf("-----------排序后-------------
");
printfSTT();
writeFile(fp);
return 0;
}
void px()
{
STT *sttHeadSave1=sttHead,*sttHeadSave2=NULL,sttSave,*nextSave;
while(sttHeadSave1->next!=NULL)
{
sttHeadSave2=sttHeadSave1->next;
while(sttHeadSave2->next!=NULL)
{
if((sttHeadSave1->next->c2)<(sttHeadSave2->next->c2))
{
sttSave=*(sttHeadSave1->next);
nextSave=sttHeadSave1->next->next;
*(sttHeadSave1->next)=*(sttHeadSave2->next);
sttHeadSave1->next->next=nextSave;
nextSave=sttHeadSave2->next->next;
*(sttHeadSave2->next)=sttSave;
sttHeadSave2->next->next=nextSave;
}
sttHeadSave2=sttHeadSave2->next;
}
sttHeadSave1=sttHeadSave1->next;
}
}
void printfSTT()
{
STT *sttHeadSave=sttHead;
printf("-----------打印链表-------------
");
while(sttHeadSave->next!=NULL)
{
printf("%s %d
",sttHeadSave->next->c1,sttHeadSave->next->c2);
sttHeadSave=sttHeadSave->next;
}
}
void readFile(FILE *fp)
{
int c2;
char c1[9];
STT *sttNew;
fseek(fp,0,SEEK_SET);
printf("-----------读取文件到链表-------------
");
while(fscanf(fp,"%s %d",c1,&c2)!=-1)
{
sttNew=(STT *)malloc(sizeof(STT));
sttNew->next=NULL;
strcpy(sttNew->c1,c1);
sttNew->c2=c2;
if(sttHead->next==NULL)
sttHead->next=sttNew;
else
sttTail->next=sttNew;
sttTail=sttNew;
}
}
void writeFile(FILE *fp)
{
fseek(fp, 0, SEEK_SET);
fseek(fp, 0, SEEK_END);
printf("-----------开始写入文件-------------
");
STT *sttHeadSave=sttHead;
fprintf(fp,"%s","-----------排序后-------------
");
while(sttHeadSave->next!=NULL)
{
fprintf(fp,"%s %d%s",sttHeadSave->next->c1,sttHeadSave->next->c2,"
");
sttHeadSave=sttHeadSave->next;
}
printf("------------写入完成-------------
");
}
绛旓細include <stdio.h> include <string.h> include <stdlib.h> int main(){ FILE *fp;char line[1000];char wLine[1000];double SIMUL[100][100];int lineCount = 0;char *delim=" ";int ii,jj;fp = fopen("1.txt","r");if( fp==NULL){ printf("fopen error!\ ");return -1;}...
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绛旓細if(NULL==fp) return -1;//瑕佽繑鍥為敊璇唬鐮 while(fscanf(fp,"%c",&c)!=EOF) printf("%c",c); //浠鏂囨湰涓璇诲叆骞跺湪鎺у埗鍙版墦鍗板嚭鏉 fclose(fp);fp=NULL;//闇瑕佹寚鍚戠┖锛屽惁鍒欎細鎸囧悜鍘熸墦寮鏂囦欢鍦板潃 return 0;}
绛旓細include <stdio.h>#include <string.h>#include <malloc.h>typedef struct stt{ char c1[9]; int c2; struct stt *next;}STT;void readFile(FILE *fp);void writeFile(FILE *fp);void printfSTT();//鎵撳嵃閾捐〃void px();//灏嗛摼琛ㄦ寜c2闄嶅簭鎺掑垪STT *sttHead=NULL,*sttTail=NULL...
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绛旓細浣犲彲浠ヤ娇鐢ㄨ緭鍏ヨ緭鍑洪噸瀹氬悜鏉ュ皢TXT鏂囨湰涓殑瀛楃鍐呭瀵煎叆绋嬪簭涓紝鎴栬呬娇鐢ㄦ爣鍑咰搴撳嚱鏁帮細fopen()鍜宖getc();鍏堜娇鐢╢open()鍑芥暟鎵撳紑TXT鏂囨湰鏂囦欢锛岀劧鍚庝娇鐢╢getc璇诲彇鏂囨湰鏂囦欢涓鐨勫瓧绗︺傝鍙栧叏閮ㄦ枃鏈腑鍏ㄩ儴瀛楃鍙互浣跨敤涓涓獁hile寰幆鍔犲垽鏂槸鍚﹁鍙栧埌鏂囦欢缁撳熬鏉ュ疄鐜帮細char ch锛泈hile((ch= fgetc(fp)) != EOF)杩...
绛旓細1.鐢"璁颁簨鏈"鍒涘缓a.txt鏂囦欢,淇濆瓨鍦ㄤ竴涓鏂囦欢澶逛腑,璁句繚瀛樺湪d:\涔嬩笅 2.缂栧啓绋嬪簭,骞惰繍琛 include <stdio.h> int main( ){ int a[10][4]; /*鍋囧畾涓嶈秴杩10琛,姣忚涓瀹氭湁4涓厓绱*/ int i,j;FILE *fp;/*鎵撳紑鏂囦欢*/ fp=fopen("d:\\a.txt","r"); /*鍋囪a.txt鍦╠鐩樻牴鐩綍涓*/ ...
