C Programming - Floating Point Issues - Discussion
Discussion Forum : Floating Point Issues - Point Out Errors (Q.No. 1)
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;
}
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 */
}
Discussion:
36 comments Page 3 of 4.
Santa said:
1 decade ago
In case of e[i].name it is not showing any error then why in the case of &e[i].sal it is shown the error ?
Ankit said:
1 decade ago
Please help me. Is it because of & not there before e[i].
JjB said:
1 decade ago
e[i].name refers to the address so no need of &.
Pramod mohite said:
1 decade ago
Why the problem use the float value use in structure?
Madhu said:
1 decade ago
Since there no addressing pointer like '&' in scanf. It generates an error.
Kunal said:
1 decade ago
No sir in gcc you can also link the float variable.
main(){
struct emp{
float k;
};
struct emp e;
printf("enter multiple vallues");
scanf("%f",&e.k);
printf("%f",e.k);
}
Try it in gcc.
main(){
struct emp{
float k;
};
struct emp e;
printf("enter multiple vallues");
scanf("%f",&e.k);
printf("%f",e.k);
}
Try it in gcc.
Kunal said:
1 decade ago
main()
{
struct emp
{
char name[25];
int age;
float sal;
};
struct emp e[2];
int i=0;
for(i=0;i<2;i++){
scanf("%s %d %f", &e[i].name, &e[i].age, &e[i].sal);
}
for(i=0;i<2;i++){
printf("%s %d %f", e[i].name, e[i].age, e[i].sal);
}
}
Try it also. It also work then what is the problem?
{
struct emp
{
char name[25];
int age;
float sal;
};
struct emp e[2];
int i=0;
for(i=0;i<2;i++){
scanf("%s %d %f", &e[i].name, &e[i].age, &e[i].sal);
}
for(i=0;i<2;i++){
printf("%s %d %f", e[i].name, e[i].age, e[i].sal);
}
}
Try it also. It also work then what is the problem?
Kalaivanan said:
1 decade ago
Floating point not linked abnormal program termination error.
Maha said:
1 decade ago
I can't understand the answer and why it is done like that?
Can anyone explain me please.
Can anyone explain me please.
Karthik said:
10 years ago
This is because Turbo and Borland C/ C++ compilers sometimes leave out floating point support and use non-floating-point version of printf and scanf to save space on smaller systems.
The dummy call to a floating-point function will force the compiler to load the floating-point support and solve the original problem.
The dummy call to a floating-point function will force the compiler to load the floating-point support and solve the original problem.
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