The C Programming Language note

 

no.1

#include<stdio.h>
#define  IN  1 // inside a word
#define  OUT 0 // outside a wrod
//count lines,words,and characters in input
void main()
 {int c,nl,nw,nc,state,wordslong;
    nl = nw = nc =0;
    state = OUT;
 while((c=getchar())!=EOF)
    {++nc;
    if(c=='\n')
        ++nl;
    if(c==' '||c=='\n'||c=='\t')
        state = OUT;
    else if(state == OUT)
        {state = IN;
        ++nw;
        }
    }
printf("%d %d %d",nl,nw,nc);
 }

 no.2

#include<stdio.h>
//count digits,white space,others
void  main()
{
int c,i,j,nwhite,nother,havei=-1;
int ndigit[10];
float count[100][12];
nwhite = nother = 0;
for(i = 0; i<10; ++i)
    ndigit[i] = 0;

while((c=getchar())!=EOF)
    if(c >= '0' && c <= '9')
        ++ndigit[c - '0'];
    else if (c == '\n' || c == '\t'  || c == ' ')
        ++nwhite;
    else
        ++nother;

for(i = 0 ; i < 100 ; i++)
    {for( j= 0 ; j < 12 ; j++)
       count[i][j] =0;
    }
for(j = 0 ; j< 10 ; ++j)
    for(i = 0 ; i < ndigit[j] ; ++i)
        count[i][j]=1;

for(i= 0 ;i < nwhite; ++i)
    count[i][10]=1;


for(i= 0 ;i < nother; ++i)
    count[i][11]=1;


for(i = 99 ; i >=0 ; --i)
    {for( j= 0 ; j < 12 ; j++)
        if(count[i][j] == 1)
            {havei=i;
            break;
            }
    if(havei!=-1)
        break;
    }

printf("\n\n\nThis is the result：\n");

for(i = havei ; i >=0 ; --i)
    {for( j= 0 ; j < 12 ; j++)
        if(count[i][j]==0)
            printf("%-4c", ' ');
        else
            printf("%-4c",3);

    printf("\n");
    }

for(i=0;i<10;++i)
    printf("%-4d",i);

printf("no  nw\n");
}

no.3