loop over input in C-code and write data to different files using terminal at once - c

Question

I wrote a C code which extracts data from a binary file which has size around 1 GB. There are 101 (0 to 100)configurations and the C code extracts data for a selected configuration and writes the output in a file. To compile the C code, I give user defined configuration number like this in the terminal:
gcc binary2textperconfig.c -o f.out
./f.out proton-p000-1.bin out1.txt
Then it asks for configuration number:
Enter the configuration number:
After that the data is written in file "out0.txt". Now I want to run this code for all 101 configurations and write those data to files "out0.txt", "out1.txt",...., "out100.txt" etc. I don't know how to do this without typing the configuration numbers 101 times in the terminal. Could any one please help me? Here is my C-code:
#include <stdio.h>
#include<complex.h>
#include<math.h>
#include <stdlib.h>
#include <gsl/gsl_sf_gamma.h>
#include <gsl/gsl_matrix.h>
typedef double complex dcomplex;
//Data is converted to Bigendian using io-general
double constructfloat(char bytes[sizeof(double)/2], int order)
{
double dRes;
char *pc;
int i;
if (order == 0)
for(i=0, pc = (char*) &dRes; i<=sizeof(double)-1 ; i++, pc++)
(*pc) = bytes[i];
else
for(i=sizeof(double)-1, pc = (char*) &dRes; i>=0; i--, pc++)
(*pc) = bytes[i];
return dRes;
}
int main(int argc, char *argv[]){
int configcount = 101;
int mcount = 14;
int tcount = 64;
int d1count = 4;
int d2count = 4;
int pcount = 45;
int userci;
int usermi;
int userpi;
// number of complex numbers per configuration
int unitcountperconfig =(mcount*tcount*d1count*d2count*pcount);
// initialize loop index variables
int ci = 0; //config
int mi = 0; //mass
int ti = 0;
int d1i = 0;
int d2i = 0;
int pi = 0; //momentum
// for holding the result of read operation ( how many units have been read)
int result;
// for holding the data read from file
char * cbuff;
// input file handle from where binary data is read
FILE * fin = fopen(argv[1],"rb");
// if the input file cannot be read for reading, close opened file handles, show an error message to the user, and exit
if (fin==NULL)
{
fputs ("Error opening input file\n",stderr);
exit (1);
}
FILE * fout = fopen(argv[2],"wt");
// if the output file cannot be opened for writing, close opened file handles, show an error message to the user, and exit
if (fout==NULL)
{
fclose(fin);
fputs ("Error opening output file\n",stderr);
exit (1);
}
// take input from the user
// take input from the user
printf("Enter the configuration number: ");
scanf("%d",&userci);
// allocate memory to contain the chunk of data for a time slice:
cbuff = (char*)malloc(sizeof(dcomplex)*unitcountperconfig );
// show error message and exit if memory allocation failed
if(cbuff == NULL)
{
fputs("Buffer allocation failed.", stderr);
exit(1);
}
// variable to hold a complex number read from the file
dcomplex aComplexNumber;
dcomplex sumpertimeslice[tcount];
// loop on time slices
for( ci = 0; ci< configcount ; ci++){
// index of the complex number being read
unsigned int cNumberIdx = 0;
// debugging message
printf("reading data for configuration: %d\n",ci);
// perform read operation to read the desired chunk of data
result = fread(cbuff, sizeof(char), sizeof(dcomplex)*unitcountperconfig, fin );
// if size of data successfully read is not equal to what we wanted to read, notify the user and exit
if (result != sizeof(dcomplex)*unitcountperconfig) {
fputs ("data reading error\n",stderr);
exit (3);
}
double realP;
double imagP;// variable to hold real and imaginary part of the complex number
double realPSum;
double imagPSum;// variable to hold sum of real and sum of imaginary part of the current sum per time slice
for (mi =0; mi< mcount ; mi++){
for (ti =0; ti< tcount ; ti++){
// array to hold trace for each time slice
sumpertimeslice[ti] = 0.0 + 0.0*_Complex_I;
for (d1i =0; d1i < d1count ; d1i++){
for (d2i =0; d2i < d2count ; d2i++){
for (pi =0; pi < pcount ; pi++){
aComplexNumber = constructfloat( &cbuff[cNumberIdx], 0 ) + constructfloat( &cbuff[cNumberIdx+ ((int)sizeof(dcomplex))/2 ], 0 )*_Complex_I;
if (ci== userci)
{
cNumberIdx += (int)sizeof(dcomplex);
if (cimag(aComplexNumber)>0)
{fprintf( fout, "%d,%d,%d,%d,%d,%d,%e+%ei\n" ,ci+1, mi+1,ti+1, d1i+1,d2i+1,pi+1,creal( aComplexNumber ),cimag( aComplexNumber ) );}
else
{fprintf( fout, "%d,%d,%d,%d,%d,%d,%e%ei\n" ,ci+1, mi+1,ti+1, d1i+1,d2i+1,pi+1,creal( aComplexNumber ),cimag( aComplexNumber ) );}
}
}
}
}
}
}
}
// free the allocated memory
free(cbuff);
// close the opened file handles
fclose(fin);
fclose(fout);
//fclose(complexNumberFileP);
}

Answer 1

Use the seq utility to generate a list of number between 0 & 100, and send it as a string to stdin.
for CNUMBER in $(seq 0 100); do
./f.out proton-p000-1.bin out${CNUMBER}.txt <<< "${CNUMBER}"
done
or
for CNUMBER in $(seq 0 100); do
echo $CNUMBER | ./f.out proton-p000-1.bin out${CNUMBER}.txt
done