So I am suppose to write a program that will implementing one method if computing
checksums for a file containing integers.
I am executing the program by a command line from the following form:
p4a inputfile outputfile
I can compile the program in Dev C++ compiler with no errors. But the problem is that
when compile the program in unix command line by:
gcc p4a.c
I get the following errors:
p4a.c: In function `main':
p4a.c:42: parse error before `*'
p4a.c:43: `fp2' undeclared (first use in this function)
p4a.c:43: (Each undeclared identifier is reported only once
p4a.c:43: for each function it appears in.)
Can anyone point me in the right direction in fixing these errors so that I can compile correctly by command line
Here is the code below:
#include<stdio.h>
#include<string.h>
main(int argc,char* argv[])
{
short int a[100][5];
short int res;
FILE *fp1;
if(!(fp1=fopen(argv[1],"r")))
printf("Error opening file\n");
else
{
int i,j,k,l;
i=j=0;
while(!feof(fp1))
{
for(j=0;j<4;j++)
fscanf(fp1,"%d",&a[i][j]);
i++;
}
for(k=0;k<i;k++)
{
unsigned short int musk=!0; //musk=11...111
musk=musk|15; //musk=000..001111
musk=musk<<12; //musk=111100..000
res=0;
for(l=0;l<4;l++)
{
short int temp=(a[k][l]&musk);
res=res|temp;
musk=musk>>4;
}
a[k][4]=res;
}
FILE *fp2;
if(!(fp2=fopen(argv[2],"w")))
printf("Error:cannot open file");
else
{
for(k=0;k<i;k++)
{
for(j=0;j<5;j++)
fprintf(fp2,"%d%s",a[k][j],"\t");
fprintf(fp2,"%s","\n");
}
fclose(fp1);
fclose(fp2);
}
}
return 0;
}
