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 1 of 4.
Rahul said:
8 years ago
#include<stdio.h>
typedef struct
{
int roll;
char name[10];
float avg;
}student;
void linkfloat() // THIS FUNCTION IS USED TO LINK THE FLOATING POINT MEMBER
{
float a = 0, *b;
b = &a;
a = *b;
}
void main(void)
{
student *s;
clrscr();
printf("\n\tEnter roll : ");
scanf("%d", &s->roll);
fflush(stdin);
printf("\n\tEnter name : ");
gets(s->name);
fflush(stdin);
printf("\n\tEnter avg : ");
scanf("%f", &s->avg);
fflush(stdin);
printf("\n\tRoll : %d", s->roll);
printf("\n\tName : %s", s->name);
printf("\n\tAvg : %f", s->avg);
getch();
}
A special function called link float ( ) should be enclosed within the scope of the program. This function will get executed automatically to link the floating point member at runtime.
typedef struct
{
int roll;
char name[10];
float avg;
}student;
void linkfloat() // THIS FUNCTION IS USED TO LINK THE FLOATING POINT MEMBER
{
float a = 0, *b;
b = &a;
a = *b;
}
void main(void)
{
student *s;
clrscr();
printf("\n\tEnter roll : ");
scanf("%d", &s->roll);
fflush(stdin);
printf("\n\tEnter name : ");
gets(s->name);
fflush(stdin);
printf("\n\tEnter avg : ");
scanf("%f", &s->avg);
fflush(stdin);
printf("\n\tRoll : %d", s->roll);
printf("\n\tName : %s", s->name);
printf("\n\tAvg : %f", s->avg);
getch();
}
A special function called link float ( ) should be enclosed within the scope of the program. This function will get executed automatically to link the floating point member at runtime.
(1)
Divya said:
8 years ago
While I am using float inside a structure, it is fine working in GCC compiler.
Subha said:
9 years ago
Thank you, @Badhri. Your example grasping easily.
Consfused said:
9 years ago
See this is a real big problem for us. We are stuck here at our lab because of this we need a solution right now.
Ashok said:
10 years ago
Why don't you choose option C? Can you please explain me?
Bvdkprasad said:
10 years ago
Useful for me in turbo C.
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.
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.
Kalaivanan said:
1 decade ago
Floating point not linked abnormal program termination error.
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?
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