571255

An1006216251

200922226

An52385712515-3读取文件内容

#include"stdio.h"

main()

{ FILE *fp;

int m,n,i=0;

char file[20],ch[20],c;

scanf("%s%d",file,&n);

if( ( fp=fopen(file,"r") )==NULL)

{ printf("File Name Error.\n");

exit(0);

}

if(n>5)

printf("Line No Error.\n");

if(n==1)

printf("T");

for(i=1;(c=fgetc(fp))!=EOF;)

{

if(c=='\n')

i++;

for(;i==n;)

{ c=fgetc(fp);

putchar(c);

if(c=='\n')

{ i++;

break;

}

}

}

fclose(fp);

}

15-2数据编号

void sort ( struct data *pa , int n )

{ int i,j,k=0;

for(i=0;i

{ while(pa[k].no!=0)

k++;

for(j=0;j

if(pa[j].no==0&&*pa[j].p

k=j;

pa[k].no=i+1;

}

}

15-1输出字母正方形

#include"stdio.h"

main()

{ int i,n,j,k,m,l;

char a,min();

scanf("%c %d",&a,&n);

if(96

a=a-32;

k=a;

m=(n+1)/2;

for(i=0;i

{ for(j=0;j

if(j

printf("%c",min(a,i,j));

else

if(j>=m&&i

printf("%c",min(a,i,n-j-1));

else

if(j=m)

printf("%c",min(a,n-i-1,j));

else

printf("%c",min(a,n-i-1,n-1-j));

printf("\n");

}

}

char min( char a,int i,int j )

{ char k;

if(i<=j)

k=i+a;

else

k=j+a;

if(k>90)

k=k-26;

return(k);

}

14-3数制转换

#include"stdio.h"

#include"string.h"

main()

{ int m,n,i,j,k;

char a[10][10]={'\0'};

scanf("%d%d",&n,&m);

for(k=0;;k++)

{ scanf("%s",&a[k]);

if(strcmp(a[k],"0")==0)

break;

}

for(i=0;i

{daoshu ( a[i] );

j=shi( a[i] , n );

zhuanm(j,m);

if(i

printf(" ");

}

printf("\n");

}

shi( char *p ,int n )

{ int j;

if(*(p+1)=='\0')

j=(*p-48);

else

j=(*p-48)+n*shi( p+1,n );

return(j);

}

zhuanm(int j,int m)

{

if(j

printf("%d",j);

else

{ zhuanm( j/m,m );

printf("%d",j%m);

}

}

daoshu( char *a )

{ char *p=a,temp;

while( *p!='\0')

p++;

p--;

while(a

{ temp=*a;

*a=*p;

*p