errors when i first ran it

prog1.c: In function ‘main’:
prog1.c:181: error: case label in scope of identifier with variably modified type not containing enclosing switch statement
prog1.c:253: error: case label in scope of identifier with variably modified type not containing enclosing switch statement
prog1.c:317: error: expected declaration or statement at end of input
prog1.c:317: error: expected declaration or statement at end of input


I am attaching the c program for your reference. Thanks:)

Jeez, 300+ lines and not a single indent!
No wonder you can't find any errors for looking.

Code:

---

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>

//powee function declaration
float powe(float x,float y)
{
  if(y==0)
  return 1;
  else
  return(x*powe(x,y-1));
}

//bin to decimal conv function declaration
bin2dec(int *dec,int k,int *bp)
{
  *dec=0;
  int i;
  for(i=k-1;i>=0;i--)
  {*dec=*dec+(*(bp+i))*powe(2,k-1-i);}
  return(1);
} 

//main function

int main(int argc,char *argv[])
{
  int r;
  char type1[] = "GAg";
  char type2[] = "GAp";
  char type3[] = "PAg";
  char type4[] = "Gshare";
  //assigning 'r' a value which is based on the type of scheme required here
  if(strcmp(argv[2],type1)==0)
  r=1;
  if(strcmp(argv[2],type2)==0)
  r=2;
  if(strcmp(argv[2],type3)==0)
  r=3;
  if(strcmp(argv[2],type4)==0)
  r=4;
  switch(r)
  {
  case 1: //GAg scheme
    {
      int i,k,j;
      float hitrate;
      k=atoi(argv[4]);
      j=powe(k,2);
      int bht[k], pht[j];
      int branchaddr, targetaddr, tnt, dec;
      int prediction;
      //initialising the history bits to 0 and PHT entries to 01 as given
      for(i=0;i<k;i++)
      {bht[i]=0;}
      for(i=0;i<j;i++)
      {pht[i]=1;}

      //accessing the given text file
      FILE *fp1, *fp2;
      int total=0,wrong=0,correct=0;
      fp1=fopen("history.txt", "r");
      fp2=fopen("output.txt", "w");
      while(fscanf(fp1,"%x %x %d",&branchaddr,&targetaddr,&tnt) != EOF)
      {
        i=bin2dec(&dec,k,bht); 
        //doing a prediction here
        if(pht[dec]==0 || pht[dec]==1)
        {prediction==0;}
        if(pht[dec]==2 || pht[dec]==3)
        {prediction==1;}
        total=total+1;
        //checking if my prediction is ryt and inc the corresponding var
        if(prediction==tnt)
        {correct++;}
        if(prediction!=tnt)
        {wrong++;}
        //am updating the counters based on the tnt values given.
        if(tnt==1)
        {
          if(pht[dec]<3)
          {pht[dec]++;}
        }
        if(tnt==0)
        {
          if(pht[dec]>0)
          {pht[dec]--;}
        }
        //updating the bht-usng ryt shift reg
        for(i=0; i<=k-1; i++)
        {bht[i]=bht[i+1];
          bht[k-1]=tnt;
        }
        i=bin2dec(&dec,k,bht);
        fprintf(fp2,"%d %d\t %d\t %d %d %d %d\n",tnt,prediction,dec,pht[0],pht[1],pht[2],pht[3] );
      }
      //printing the outputs
      printf("Total no of predictions made\n%d",total);
      printf("no of correct\n%d no of wrong \n%d",correct, wrong);
      hitrate=(correct/total)*100;
      printf("hitrate is\n%f", hitrate);
      break;
    }
  case 2://GAp scheme
    {
      int i,j,k,s,x,temp,n;
      int prediction;
      int total,correct,wrong; 
      float hitrate;
      FILE *fp1,*fp2;
      int branchaddr,targetaddr,tnt,dec;
      k=atoi(argv[4]);
      s=atoi(argv[6]);
      j=powe(2,k);
      x=s/j;
      int bht[k];
      int pht[j][x];
      //intialising all the entries of pht to 1
      for(i=0;i<j;i++)
      {
        for(n=0;n<x;n++)
        {
          pht[i][n]==0;
        }
      }
      //initialising all the entries of bht to 0
      for(i=0;i<k;i++)
      {bht[i]=0;}
      //accessing the text file
      fp1=fopen("history.txt","r");
      fp2=fopen("output.txt","w");
      while (fscanf(fp1,"%x %x %d",&branchaddr,&targetaddr,&tnt) != EOF)
      {
        if(k==2 && s==32)
        {temp=branchaddr&7;}
        if(k==2 && s==64)
        {temp=branchaddr&15;}
        if(k==2 && s==128)
        {temp=branchaddr&31;}
        if(k==4 && s==32)
        {temp=branchaddr&1;}
        if(k==4 && s==64)
        {temp=branchaddr&3;}
        if(k==4 && s==128)
        {temp=branchaddr&7;}
        i=bin2dec(&dec,k,bht);
        //doing a prediction here
        if(pht[dec][temp]==0 || pht[dec][temp]==1)
        {prediction==0;}
        if(pht[dec][temp]==2 || pht[dec][temp]==3)
        {prediction==1;}
        total=total+1;
        //checking if my prediction is ryt and inc the corresponding var
        if(prediction==tnt)
        {correct++;}
        if(prediction!=tnt)
        {wrong++;}
        //am updating the counters based on the tnt values given.
        if(tnt==1)
        {
          if(pht[dec][temp]<3)
          {pht[dec][temp]++;}
        }
        if(tnt==0)
        {
          if(pht[dec][temp]>0)
          {pht[dec][temp]--;}
        }
        //updating the bht-usng ryt shift reg
        for(i=0; i<=k-1; i++)
        {bht[i]=bht[i+1];}
        bht[k-1]=tnt;

        //printing the outputs
        printf("Total no of predictions made\n%d",total);
        printf("no of correct\n%d no of wrong \n%d",correct, wrong);
        hitrate=(correct/total)*100;
        printf("hitrate is\n%f", hitrate);
        break;
      }
    case 3:
      {
        int i,j,k,s,temp,n;
        int prediction;
        int total,correct,wrong; 
        float hitrate;
        FILE *fp1,*fp2;
        int branchaddr,targetaddr,tnt,dec;
        k=atoi(argv[4]);
        s=atoi(argv[6]);
        j=powe(2,k);
        int pht[j];
        temp=s/k;
        int bht[temp][k];
        //initialising the history bits to 0 and PHT entries to 01 as given
        for(i=0;i<temp;i++)
        {
          for(n=0;n<k;n++)
          {
            bht[i][n]=0;
          }
        }
        for(i=0;i<j;i++)
        {pht[i]=1;}
        //accessing the text file
        fp1=fopen("history.txt","r");
        fp2=fopen("output.txt","w");
        while (fscanf(fp1,"%x %x %d",&branchaddr,&targetaddr,&tnt) != EOF)
        {
          if(s==32)
          {temp=branchaddr&31;}
          if(s==64)
          {temp=branchaddr&63;}
          if(s==128)
          {temp=branchaddr&127;}
          bin2dec(&dec,k,&bht[temp][0]);
          int index=dec;
          if(pht[index]==0 || pht[index]==1)
          {prediction=0;}
          if(pht[index]==2 || pht[index]==3)
          {prediction=1;}
          total=total+1;
          if(tnt==prediction)
          correct++;
          if(tnt!=prediction)
          wrong++;
          //am updating the counters based on the tnt values given. 
          if(tnt==1)
          {
            if (pht[index]<3)
            {
              pht[index]++;
            }
          }
          if(tnt==0)
          {
            if(pht[index]>0)
            {pht[index]--;
            }
          }
          //updating the bht-usng ryt shift reg
          for(i=0;i<k-1;i++)
          {bht[temp][i]=bht[temp][i+1];}
          bht[temp][k-1]=tnt;
          bin2dec(&dec,k,&bht[temp][0]);
          //printing the outputs
          printf("Total no of predictions made\n%d",total);
          printf("no of correct\n%d no of wrong \n%d",correct, wrong);
          hitrate=(correct/total)*100;
          printf("hitrate is\n%f", hitrate);
          break;
        }
      case 4:
        {
          int i,j,k,temp,n;
          int prediction;
          int total,correct,wrong;
          int index; 
          float hitrate;
          FILE *fp1,*fp2;
          int branchaddr,targetaddr,tnt,dec;
          k=atoi(argv[4]);
          j=powe(2,k);
          int pht[j],bht[k];
          //initialising the history bits to 0 and PHT entries to 01 as given
          for(i=0;i<k;i++)
          {bht[i]=0;}
          for(i=0;i<j;i++)
          {pht[i]=1;}
          while (fscanf(fp1,"%x %x %d",&branchaddr,&targetaddr,&tnt) != EOF)
          {
            if(k==4)
            {temp=branchaddr&15;}
            if(k==6)
            {temp=branchaddr&63;}
            if(k==7)
            {temp=branchaddr&127;}
            index=temp^dec;
            //doing a prediction here
            if(pht[index]==0 || pht[index]==1)
            {prediction=0;}
            if(pht[index]==2 || pht[index]==3)
            {prediction=1;}
            total=total+1;
            if(tnt==prediction)
            correct++;
            if(tnt!=prediction)
            wrong++;
            //am updating the counters based on the tnt values given. 
            if(tnt==1)
            {
              if (pht[index]<3)
              {
                pht[index]++;
              }
            }
            if(tnt==0)
            {
              if(pht[index]>0)
              {pht[index]--;
              }
            }
            //updating the bht-usng ryt shift reg
            for(i=0;i<k-1;i++)
            {bht[i]=bht[i+1];}
            bht[k-1]=tnt;
            i=bin2dec(&dec,k,bht);
          }
          //printing the outputs
          printf("Total no of predictions made\n%d",total);
          printf("no of correct\n%d no of wrong \n%d",correct, wrong);
          hitrate=(correct/total)*100;
          printf("hitrate is\n%f", hitrate);
          break;
        }
      }
    }

---

Look CAREFULLY!
See how case 3 and case 4 are indented more and more?
See how the final closing brace isn't in column 1?

That's right, your braces are all mis-matched.

Tip:
Always type your {} "" /**/ () in pairs, then move the cursor to fill in.

Code:

---

for ( ) {
}

---

then, and only then do you move the cursor and fill in the loop condition

Code:

---

for ( a ; b ; c ) {
}

---

At this point, you can press 'compile' to see that it compiles. If not, you FIX IT there and then.

Then you add the body to the loop, compile and TEST

Code:

---

for ( a ; b ; c ) {
  // do some stuff
}

---

The point is, the code is never more than a few edits from being in a compilable state. If you rely on medium term memory to remember where to put all the braces, you're screwed.

Measured progress is a skill
http://cboard.cprogramming.com/c-pro...t-process.html

Dumping 300+ lines on a message board for someone else to fix is not a long term strategy.

It gives me segmentation fault.

OK, but we still can't see your latest code.

I am uploading the edited program again. I got no errors when I compiled it. But when I tried executing it, I get segmentation fault. Please help...

So do
gcc -g prog1.c
gdb a.out

Then type
run

and wait for it to crash.
Then you can examine the variables on the line of code gdb points you at, to figure out which pointer is garbage, or which array access is out of bounds.