I'm just trying my hand in bash, so I wrote a simple program in C to count the number of characters in a file.
This is my C program:
#include <stdio.h>
int main()
{
int i, nc;
nc = 0;
i = getchar();
while (i!=EOF){
nc = nc + 1;
i = getchar();
}
printf("%d\n",nc);
return 0;
}
This is the bash command I'm using to compile and execute:
gcc sign.c < bright_side_of_life > output
My output file is completely empty though. Where am I going wrong?
You have to compile first, then run:
gcc -o sign sign.c
./sign < bright_side_of_life > output
Also, technically this is not piping the output of the program to a file; it is simply redirecting it. If you really wanted a pipe involved, you'd probably go in for some 'feline abuse' (meaning, use the 'cat' command):
./sign < bright_side_of_life | cat > output
However, the I/O redirection is more normal and (though it really doesn't matter in this context) more efficient.
gcc sign.c -o output
./output < bright_side_of_life > size.txt
and i hope you are actually practising your C language. otherwise, just use the wc tool
