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Editorial Team
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Asked: 2026-05-25T21:32:05+00:00

I have a data file that contains the following information for radius, density, acceleration,

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I have a data file that contains the following information for radius, density, acceleration, and pressure:

1.464e+22 1.403e-25 1.290e-08 6.325-10

1.539e+22 1.394e-25 1.680e-08 6.309-10

1.616e+22 1.384e-25 2.030e-08 6.289e-10

1.693e+22 1.373e-25 2.344e-08 6.266e-10

1.769e+22 1.362e-25 2.628e-08 6.239e-10

How can I store this data in arrays (e.g., radius[], density[])? The code to read the data file is as follows:

#include"stdio.h"

#define NDATA 5

int main()    
{    
    FILE *fo;

    int i;
    float r[NDATA];
    float rho[NDATA];
    float g[NDATA];
    float p[NDATA];

    fo = fopen("data.txt", "r");


    /* Read data */
    for (i = 0; i<NDATA; i++)
    {   
        fscanf(fo, "%f %f %f %f", &r[i], &rho[i], &g[i], &p[i]);
        printf(" read line %d %e %e %e %e\n", i, r[i], rho[i], g[i], p[i]);
    }   
}
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1 Answer

  1. Editorial Team
    #include"stdio.h"

#define NDATA 5

int main()    
{    
    FILE *fo;

    int i;
    float r[NDATA];
    float rho[NDATA];
    float g[NDATA];
    float p[NDATA];

    fo = fopen("data.txt", "r");
    fscanf();
    fscanf();

    /* Read data */
    for (i = 0; i<NDATA; i++)
    {   
        fscanf(fo, "%f %f %f %f", &r[i], &rho[i], &g[i], &p[i]);
        fscanf(fo);
        printf(" read line %d %e %e %e %e\n", i, r[i], rho[i], g[i], p[i]);
    }   
}

    This should work since you will not be reading in the first two lines and blank lines.

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