Short Notes: Formatted Input-Output | Short Notes for Computer Science Engineering - Computer Science Engineering (CSE) PDF Download

 Page 1


FORMATTED INPUT-OUTPUT
Data can be entered & displayed in a particular format. Through format specifications, better 
presentation of results can be obtained.
Variations in Output for integer & floats:
# include <stdio.h> 
int main()
{
printf("Case 1:%6d\n",9876);
/* Prints the number right justified within 6 columns */ 
printf("Case 2:%3d\n",9876);
/* Prints the number to be right justified to 3 columns but, there are 4 digits so number is not 
right justified */
printf("Case 3:%.2f\n",987.6543);
/* Prints the number rounded to two decimal places */ 
printf("Case 4:%.f\n",987.6543);
/* Prints the number rounded to 0 decimal place, i.e, rounded to integer */ 
printf("Case 5:%e\n",987.6543);
/* Prints the number in exponential notation (scientific notation) */ 
return 0;
}
Output
Case 1: 9876 
Case 2:9876 
Case 3:987.65 
Case 4:988
Case 5:9.876543e+002
Variations in Input for integer and floats:
#include <stdio.h> 
int main()
{
int a,b; 
float c,d;
printf("Enter two intgers: ");
/*Two integers can be taken from user at once as below */
Page 2


FORMATTED INPUT-OUTPUT
Data can be entered & displayed in a particular format. Through format specifications, better 
presentation of results can be obtained.
Variations in Output for integer & floats:
# include <stdio.h> 
int main()
{
printf("Case 1:%6d\n",9876);
/* Prints the number right justified within 6 columns */ 
printf("Case 2:%3d\n",9876);
/* Prints the number to be right justified to 3 columns but, there are 4 digits so number is not 
right justified */
printf("Case 3:%.2f\n",987.6543);
/* Prints the number rounded to two decimal places */ 
printf("Case 4:%.f\n",987.6543);
/* Prints the number rounded to 0 decimal place, i.e, rounded to integer */ 
printf("Case 5:%e\n",987.6543);
/* Prints the number in exponential notation (scientific notation) */ 
return 0;
}
Output
Case 1: 9876 
Case 2:9876 
Case 3:987.65 
Case 4:988
Case 5:9.876543e+002
Variations in Input for integer and floats:
#include <stdio.h> 
int main()
{
int a,b; 
float c,d;
printf("Enter two intgers: ");
/*Two integers can be taken from user at once as below */
scanf("%d%d", &a, &b);
printf("Enter intger and floating point numbers: ");
/*Integer and floating point number can be taken at once from user as below */ 
scanf("%d%f', &a, &c); 
return 0;
}
Similarly, any number of inputs can be taken at once from user.
EXERCISE:
1 . To print out a and b given below, which of the following printf() statement will you use?
# include <stdio.h> 
float a=3.14; 
double b=3.14;
A. printf("%f %lf", a, b);
B. printf("%Lf %f", a, b);
C. printf("%Lf %Lf", a, b);
D. printf("%f %Lf", a, b);
2. To scan a and b given below, which of the following scanf() statement will you use?
# include <stdio.h> 
float a; 
double b;
A. scanf("%f %f", &a, &b);
B. scanf("%Lf %Lf", &a, &b);
C. scanf("%f %Lf", &a, &b);
D. scanf("%f %lf", &a, &b);
3. For a typical program, the input is taken using.
A. scanf
B. Files
C. Command-line
D. None of the mentioned
Page 3


FORMATTED INPUT-OUTPUT
Data can be entered & displayed in a particular format. Through format specifications, better 
presentation of results can be obtained.
Variations in Output for integer & floats:
# include <stdio.h> 
int main()
{
printf("Case 1:%6d\n",9876);
/* Prints the number right justified within 6 columns */ 
printf("Case 2:%3d\n",9876);
/* Prints the number to be right justified to 3 columns but, there are 4 digits so number is not 
right justified */
printf("Case 3:%.2f\n",987.6543);
/* Prints the number rounded to two decimal places */ 
printf("Case 4:%.f\n",987.6543);
/* Prints the number rounded to 0 decimal place, i.e, rounded to integer */ 
printf("Case 5:%e\n",987.6543);
/* Prints the number in exponential notation (scientific notation) */ 
return 0;
}
Output
Case 1: 9876 
Case 2:9876 
Case 3:987.65 
Case 4:988
Case 5:9.876543e+002
Variations in Input for integer and floats:
#include <stdio.h> 
int main()
{
int a,b; 
float c,d;
printf("Enter two intgers: ");
/*Two integers can be taken from user at once as below */
scanf("%d%d", &a, &b);
printf("Enter intger and floating point numbers: ");
/*Integer and floating point number can be taken at once from user as below */ 
scanf("%d%f', &a, &c); 
return 0;
}
Similarly, any number of inputs can be taken at once from user.
EXERCISE:
1 . To print out a and b given below, which of the following printf() statement will you use?
# include <stdio.h> 
float a=3.14; 
double b=3.14;
A. printf("%f %lf", a, b);
B. printf("%Lf %f", a, b);
C. printf("%Lf %Lf", a, b);
D. printf("%f %Lf", a, b);
2. To scan a and b given below, which of the following scanf() statement will you use?
# include <stdio.h> 
float a; 
double b;
A. scanf("%f %f", &a, &b);
B. scanf("%Lf %Lf", &a, &b);
C. scanf("%f %Lf", &a, &b);
D. scanf("%f %lf", &a, &b);
3. For a typical program, the input is taken using.
A. scanf
B. Files
C. Command-line
D. None of the mentioned
4. What is the output of this C code?
#include <stdio.h> 
int main()
{ int i = 10, j = 2;
printf("%d\n", printf("%d %d " , i, j));
}
A. Compile time error
B. 10 2 4
C. 10 2 2
D. 10 2 5
5. What is the output of this C code?
#include <stdio.h> 
int main()
{
int i = 10, j = 3; 
printf("%d %d %d", i, j);
}
A. Compile time error
B. 10 3
C. 10 3 some garbage value
D. Undefined behavior
6. What is the output of this C code?
#include <stdio.h> 
int main()
{ int i = 10, j = 3, k = 3; 
printf("%d %d " , i, j, k);
}
A. Compile time error
B. 10 3 3
C. 10 3
D. 10 3 somegarbage value
Page 4


FORMATTED INPUT-OUTPUT
Data can be entered & displayed in a particular format. Through format specifications, better 
presentation of results can be obtained.
Variations in Output for integer & floats:
# include <stdio.h> 
int main()
{
printf("Case 1:%6d\n",9876);
/* Prints the number right justified within 6 columns */ 
printf("Case 2:%3d\n",9876);
/* Prints the number to be right justified to 3 columns but, there are 4 digits so number is not 
right justified */
printf("Case 3:%.2f\n",987.6543);
/* Prints the number rounded to two decimal places */ 
printf("Case 4:%.f\n",987.6543);
/* Prints the number rounded to 0 decimal place, i.e, rounded to integer */ 
printf("Case 5:%e\n",987.6543);
/* Prints the number in exponential notation (scientific notation) */ 
return 0;
}
Output
Case 1: 9876 
Case 2:9876 
Case 3:987.65 
Case 4:988
Case 5:9.876543e+002
Variations in Input for integer and floats:
#include <stdio.h> 
int main()
{
int a,b; 
float c,d;
printf("Enter two intgers: ");
/*Two integers can be taken from user at once as below */
scanf("%d%d", &a, &b);
printf("Enter intger and floating point numbers: ");
/*Integer and floating point number can be taken at once from user as below */ 
scanf("%d%f', &a, &c); 
return 0;
}
Similarly, any number of inputs can be taken at once from user.
EXERCISE:
1 . To print out a and b given below, which of the following printf() statement will you use?
# include <stdio.h> 
float a=3.14; 
double b=3.14;
A. printf("%f %lf", a, b);
B. printf("%Lf %f", a, b);
C. printf("%Lf %Lf", a, b);
D. printf("%f %Lf", a, b);
2. To scan a and b given below, which of the following scanf() statement will you use?
# include <stdio.h> 
float a; 
double b;
A. scanf("%f %f", &a, &b);
B. scanf("%Lf %Lf", &a, &b);
C. scanf("%f %Lf", &a, &b);
D. scanf("%f %lf", &a, &b);
3. For a typical program, the input is taken using.
A. scanf
B. Files
C. Command-line
D. None of the mentioned
4. What is the output of this C code?
#include <stdio.h> 
int main()
{ int i = 10, j = 2;
printf("%d\n", printf("%d %d " , i, j));
}
A. Compile time error
B. 10 2 4
C. 10 2 2
D. 10 2 5
5. What is the output of this C code?
#include <stdio.h> 
int main()
{
int i = 10, j = 3; 
printf("%d %d %d", i, j);
}
A. Compile time error
B. 10 3
C. 10 3 some garbage value
D. Undefined behavior
6. What is the output of this C code?
#include <stdio.h> 
int main()
{ int i = 10, j = 3, k = 3; 
printf("%d %d " , i, j, k);
}
A. Compile time error
B. 10 3 3
C. 10 3
D. 10 3 somegarbage value
7. The syntax to print a % using printf statement can be done by.
A. %
B. %
C.
D. %%
8. What is the output of this C code?
#include <stdio.h> 
int main()
{ int n;
scanf("%d", n); 
printf("%d\n", n); 
return 0;
}
A. Compilation error
B. Undefined behavior
C. Whatever user types
D. Depends on the standard
9. What is the output of this C code?
#include <stdio.h> 
int main()
{ short int i; 
scanf("%hd", &i); 
printf("%hd", i); 
return 0;
}
A. Compilation error
B. Undefined behavior
C. Whatever user types
D. None of the mentioned
10. In a call to printf() function the format specifier %b can be used to print binary equivalent of 
an integer.
A. True
B. False
Page 5


FORMATTED INPUT-OUTPUT
Data can be entered & displayed in a particular format. Through format specifications, better 
presentation of results can be obtained.
Variations in Output for integer & floats:
# include <stdio.h> 
int main()
{
printf("Case 1:%6d\n",9876);
/* Prints the number right justified within 6 columns */ 
printf("Case 2:%3d\n",9876);
/* Prints the number to be right justified to 3 columns but, there are 4 digits so number is not 
right justified */
printf("Case 3:%.2f\n",987.6543);
/* Prints the number rounded to two decimal places */ 
printf("Case 4:%.f\n",987.6543);
/* Prints the number rounded to 0 decimal place, i.e, rounded to integer */ 
printf("Case 5:%e\n",987.6543);
/* Prints the number in exponential notation (scientific notation) */ 
return 0;
}
Output
Case 1: 9876 
Case 2:9876 
Case 3:987.65 
Case 4:988
Case 5:9.876543e+002
Variations in Input for integer and floats:
#include <stdio.h> 
int main()
{
int a,b; 
float c,d;
printf("Enter two intgers: ");
/*Two integers can be taken from user at once as below */
scanf("%d%d", &a, &b);
printf("Enter intger and floating point numbers: ");
/*Integer and floating point number can be taken at once from user as below */ 
scanf("%d%f', &a, &c); 
return 0;
}
Similarly, any number of inputs can be taken at once from user.
EXERCISE:
1 . To print out a and b given below, which of the following printf() statement will you use?
# include <stdio.h> 
float a=3.14; 
double b=3.14;
A. printf("%f %lf", a, b);
B. printf("%Lf %f", a, b);
C. printf("%Lf %Lf", a, b);
D. printf("%f %Lf", a, b);
2. To scan a and b given below, which of the following scanf() statement will you use?
# include <stdio.h> 
float a; 
double b;
A. scanf("%f %f", &a, &b);
B. scanf("%Lf %Lf", &a, &b);
C. scanf("%f %Lf", &a, &b);
D. scanf("%f %lf", &a, &b);
3. For a typical program, the input is taken using.
A. scanf
B. Files
C. Command-line
D. None of the mentioned
4. What is the output of this C code?
#include <stdio.h> 
int main()
{ int i = 10, j = 2;
printf("%d\n", printf("%d %d " , i, j));
}
A. Compile time error
B. 10 2 4
C. 10 2 2
D. 10 2 5
5. What is the output of this C code?
#include <stdio.h> 
int main()
{
int i = 10, j = 3; 
printf("%d %d %d", i, j);
}
A. Compile time error
B. 10 3
C. 10 3 some garbage value
D. Undefined behavior
6. What is the output of this C code?
#include <stdio.h> 
int main()
{ int i = 10, j = 3, k = 3; 
printf("%d %d " , i, j, k);
}
A. Compile time error
B. 10 3 3
C. 10 3
D. 10 3 somegarbage value
7. The syntax to print a % using printf statement can be done by.
A. %
B. %
C.
D. %%
8. What is the output of this C code?
#include <stdio.h> 
int main()
{ int n;
scanf("%d", n); 
printf("%d\n", n); 
return 0;
}
A. Compilation error
B. Undefined behavior
C. Whatever user types
D. Depends on the standard
9. What is the output of this C code?
#include <stdio.h> 
int main()
{ short int i; 
scanf("%hd", &i); 
printf("%hd", i); 
return 0;
}
A. Compilation error
B. Undefined behavior
C. Whatever user types
D. None of the mentioned
10. In a call to printf() function the format specifier %b can be used to print binary equivalent of 
an integer.
A. True
B. False
# include <stdio.h> 
int main()
{
char ch; 
int i;
scanf("%c", &i); 
scanf("%d", &ch); 
printf("%c %d", ch, i); 
return 0;
}
A. Error: suspicious char to in conversion in scanf()
B. Error: we may not get input for second scanf() statement
C. No error
D. None of above
11. Point out the error in the program?
12. Which of the following is NOT a delimiter for an input in scanf?
A. Enter
B. Space
C. Tab
D. None of the mentioned