IndiaBIX

C Programming - Floating Point Issues

Exercise : Floating Point Issues - Point Out Errors
1.
Point out the error in the following program. 
#include<stdio.h>
int main()
{
    struct emp
    {
        char name[20];
        float sal;
    };
    struct emp e[10];
    int i;
    for(i=0; i<=9; i++)
        scanf("%s %f", e[i].name, &e[i].sal);
    return 0;
}
Suspicious pointer conversion
Floating point formats not linked (Run time error)
Cannot use scanf() for structures
Strings cannot be nested inside structures
Answer: Option
Explanation:

Compile and Run the above program in Turbo C:

C:\>myprogram.exe
Sundar
2555.50
scanf : floating point formats not linked
Abnormal program termination

The program terminates abnormally at the time of entering the float value for e[i].sal.

Solution:

Just add the following function in your program. It will force the compiler to include required libraries for handling floating point linkages.

static void force_fpf() /* A dummy function */
{
    float x, *y; /* Just declares two variables */
    y = &x;      /* Forces linkage of FP formats */
    x = *y;      /* Suppress warning message about x */
}

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers