Simulation of Unix Commands 4

SIMULATION OF UNIX COMMANDS – Word Count (wc)

---

// 4. wc command

#include<stdio.h>

int wc,lc,cc;

---

load(fp1,g)

FILE *fp1;

char g[];

{

int n;

for(n=0;(g[n]=getc(fp1))!=EOF;n++)

if(g[n]==’\n’)

 {

g[n]=’\0′;

return 1;

}

return 0;

}

---

count(g)

char g[];

{

int n;

for(n=0;g[n]!=’\0′;n++)

{

lc++;

if(g[n]!=’\t’ && g[n]!=’ ‘ )

cc++;

if( (g[n]==’\t’ && g[n+1]!=’\t’ )||(g[n]==’ ‘ && g[n+1]!=’ ‘ ) )

wc++;

}

}

---

// main prrogram

main(int argc, char * argv[] )

{

FILE *fp;

int i;

char a[100];

if(argc!=2)

{

printf(“Usage error”);

return;

}

fp = fopen(argv[1],”r”);

if(fp==NULL)

{

printf(“File opening error”);

return;

}

i=load(fp,a);

while(i==1)

{

count(a);

i=load(fp,a);

}

printf(“\nWord Count : %d”, wc);

printf(“\nLine Count : %d”, lc);

printf(“\nCharacter Count : %d”, cc);

close(fp);

}