C語言 如何利用trim函數(shù)出除字符串頭尾的指定字符

1、trim()方法返回調(diào)用字符串對象的一個副本，但是所有起始和結(jié)尾的空格都被刪除了，例子如下：String s=" Hello World ".trim();就是把"Hello World"放入s中。

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2、例程：

void?trim(char*?s,?char?c)

{

char?*t??=?s;

while?(*s?==?c){s++;};

if?(*s)

{

char*?t1?=?s;

while?(*s){s++;};

s--;

while?(*s?==?c){s--;};

while?(t1?=?s)

{

*(t++)?=?*(t1++);

}

}

*t?=?0;

}

int?main()

{

char?mm[]?=?"**hello?word！**";

trim(mm,?'*');

printf("%s\n",?mm);

}

c語言去掉字符串的空格函數(shù)trim

c語言去掉字符串的空格函數(shù) void trim(char *s){} 如下：

#include stdio.h

void trim(char *s){

int i,L;

L=strlen(s);

for (i=L-1;i=0;i--) if (s[i]==' ')strcpy(s+i,s+i+1);

}

int main(){

char s[100];

printf("input 1 line string\n");

gets(s);

trim(s);

printf("%s\n",s);

return 0;

}

例如：

input 1 line string

abc 123 XYZ |

輸出：abc123XYZ|

c語言有n個整數(shù),去除其中重復的數(shù)字

#includestdio.h

#define?M?1024

void?main()?{?int?i,j,n,nn,a[M],b;

scanf("%d",n);?if?(?nM?)?n=M;

for?(?i=0;in;i++?)?scanf("%d",a[i]);

for?(?i=nn=1;in;i++?)?{

for?(?j=b=0;jnn;j++?)?if?(?a[i]==a[j]?)?{?b=1;break;?}

if?(?b==0?)?{?a[nn]=a[i];?nn++;?}

}

for?(?i=0;inn;i++?)?printf("%d?",a[i]);?printf("\n");

}

用c語言編寫程序?qū)崿F(xiàn)將兩個有序的文件進行合并,同時將生成的新文件輸出到屏幕上,

#include?"stdafx.h"

#include?string.h

#include?stdio.h

#include?stdlib.h

struct?STUDENT{

int?Number;

char?Name[32];

int??Class;

float?Score;

};

#define?IS_WHITE(ch)?((unsigned?char)ch=15?||?ch=='?')

//trim函數(shù)去除字符串str前后的空白字符

char?*trim(char?*str)

{

char?ch;

char?*p,?*q,?*r;

p=str;?q=str;?r=str-1;

while(1)

{

ch=*p;

if?(!IS_WHITE(ch))?break;

if?(ch==0)?break;

p++;

}

while(1)

{

ch=*p++;

*q=ch;

if?(ch==0)?break;

if?(!IS_WHITE(ch))?r=q;

q++;

}

*++r=0;

return?str;

}

int?InputStudent(const?char?*filename)

{

FILE?*f;

int?n;

char?str[200];

struct?STUDENT?student;

f=fopen(filename,"wb");

if?(f==NULL)?return?0;???//返回0表示失敗

for?(n=0;?;?++n)

{

printf("請輸入學號:?");?scanf("%d",?student.Number);

if?(student.Number==0)?break;

while(1)

{

printf("請輸入姓名:");??gets(str);

trim(str);

if?(str[0]==0)?continue;?//確保姓名不為空

strncpy(student.Name,?str,?sizeof(student.Name)-1);

//上句確保輸入姓名長度不超過31字節(jié)

break;

}

printf("請輸入班級:\n");?scanf("%d",?student.Class);

printf("請輸入成績:\n");?scanf("%f",?student.Score);

fwrite(student,?sizeof(student),1,?f);

//??????printf("%08d?%-32s?%-3d?%f\n",

//??????????student.Number,

//??????????student.Name,

//??????????student.Class,

//??????????student.Score);

}

fclose(f);

return?n;???//返回有多少個學生信息錄入

}

void?SortStudent(struct?STUDENT?*student,?int?n)

{

int?i,j;

struct?STUDENT?*a,?*b,?t;

for?(j=0;?jn-1;?++j)

{

a=student+j;

for?(i=j+1;?in;?++i)

{

b=student+i;

if?(a-Number=b-Number)?continue;?//否則交換

memcpy(t,a,sizeof(struct?STUDENT));

memcpy(a,b,sizeof(struct?STUDENT));

memcpy(b,t,sizeof(struct?STUDENT));

}

}

}

void?PrintStudent(const?struct?STUDENT?*student,?int?n)

{

int?i;

for?(i=0;?in;?++i,?++student)

printf("%08d?%-32s?%-3d?%6.1f\n",

student-Number,

student-Name,

student-Class,

student-Score);

}

void?main()

{

int?n1,?n2,?n;

struct?STUDENT?*student;

const?char?fn1[]="d:\\student1.bin";?//文件1

const?char?fn2[]="d:\\student2.bin";?//文件2

const?char?fn[]="d:\\student.bin";???//合并后的文件

FILE?*f;

printf("學生信息錄入(錄入過程中，學號輸入為0，則退出錄入)\n");

printf("第一步：%s中的學生信息錄入:\n",?fn1);

n1=InputStudent(fn1);

if?(0==n1)

{

printf("%s中的學生信息錄入有誤,退出程序\n",fn1);

return;

}

printf("第二步：%s中的學生信息錄入:\n",?fn2);

n2=InputStudent(fn2);

if?(0==n2)

{

printf("%s中的學生信息錄入有誤,退出程序\n",fn2);

return;

}

printf("第三步：合并%s,?%s\n",fn1,fn2);

student=(struct?STUDENT?*)malloc((n1+n2)*sizeof(struct?STUDENT));

f=fopen(fn1,"rb");

if?(f==NULL)?{printf("%s打開失敗,退出程序\n",fn1);?return;}

n=fread(student,sizeof(struct?STUDENT),?n1,?f);

fclose(f);

if?(n!=n1)?{printf("%s讀入錯誤,退出程序\n",fn1);?return;}

f=fopen(fn2,"rb");

if?(f==NULL)?{printf("%s打開失敗,退出程序\n",fn2);?return;}

n=fread(student+n1,sizeof(struct?STUDENT),?n2,?f);

//??PrintStudent(student,n1+n2);??//輸出學生信息

fclose(f);

if?(n!=n2)?{printf("%s讀入錯誤,退出程序\n",fn2);?return;}

n=n1+n2;

SortStudent(student,n);

f=fopen(fn,"wb");

if?(f==NULL)?{printf("%s建立失敗,退出程序\n",fn);?return;}

fwrite(student,?sizeof(struct?STUDENT),?n,?f);

fclose(f);

PrintStudent(student,n);??//輸出學生信息

free(student);

}