Question

How to use atof() to convert a string to floating point in C

Answer 1

#include <stdlib.h>
#include <stdio.h>
 
int main(void)
{
    printf("atof(\"  -0.0000978XYZ\") = %g\n", atof("  -0.0000978XYZ"));
    printf("atof(\"0.01314\") = %g\n", atof("0.01314"));
    printf("atof(\"11e15\") = %g\n", atof("11e15"));
    printf("atof(\"-0x1a\") = %g\n", atof("-0x1a"));
    printf("atof(\"inF\") = %g\n", atof("inF"));
    printf("atof(\"Nan\") = %g\n", atof("Nan"));

    return 0;
}
  
/*
run:
 
atof("  -0.0000978XYZ") = -9.78e-005
atof("0.01314") = 0.01314
atof("11e15") = 1.1e+016
atof("-0x1a") = -0
atof("inF") = 0
atof("Nan") = 0

*/

 

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