Increment and decrement operators

What is the difference between the following 2 codes?
#include //Program 1
int main()
{
int d, a = 1, b = 2;
d = a++ + ++b;
printf("%d %d %d", d, a, b);
}

#include //Program 2
int main()
{
int d, a = 1, b = 2;
d = a++ +++b;
printf("%d %d %d", d, a, b);
}
1. No difference as space doesn’t make any difference, values of a, b, d are same in both the case
2. Space does make a difference, values of a, b, d are different
3. Program 1 has syntax error, program 2 is not
4. Program 2 has syntax error, program 1 is not
What will be the output of the following C code?
#include
int main()
{
int a = 1, b = 1, c;
c = a++ + b;
printf("%d, %d", a, b);
}
1. a = 1, b = 1
2. a = 2, b = 1
3. a = 1, b = 2
4. a = 2, b = 2
What will be the output of the following C code?

#include
int main()
{
int a = 1, b = 1, d = 1;
printf("%d, %d, %d", ++a + ++a+a++, a++ + ++b, ++d + d++ + a++);
}
1. 15, 4, 5
2. 9, 6, 9
3. 9, 3, 5
4. Undefined (Compiler Dependent)
For which of the following, “PI++;” code will fail?
1. #define PI 3.14
2. char *PI = “A”;
3. float PI = 3.14;
4. none of the Mentioned
What will be the output of the following C code?

#include
int main()
{
int a = 10, b = 10;
if (a = 5)
b--;
printf("%d, %d", a, b--);
}
1. a = 10, b = 9
2. a = 10, b = 8
3. a = 5, b = 9
4. a = 5, b = 8
What will be the output of the following C code?
#include
int main()
{
int i = 0;
int j = i++ + i;
printf("%d\n", j);
}
1. 0
2. 1
3. 2
4. Compile time error
What will be the output of the following C code?

#include
int main()
{
int i = 2;
int j = ++i + i;
printf("%d\n", j);
}
1. 6
2. 5
3. 4
4. Compile time error
What will be the output of the following C code?

#include
int main()
{
int i = 2;
int i = i++ + i;
printf("%d\n", i);
}
1. = operator is not a sequence point
2. ++ operator may return value with or without side effects
3. it can be evaluated as (i++)+i or i+(++i)
4. = operator is a sequence point
What will be the output of the following C code?

#include
int main()
{
int i = 0;
int x = i++, y = ++i;
printf("%d % d\n", x, y);
return 0;
}
1. 0, 2
2. 0, 1
3. 1, 2
4. Undefined
What will be the output of the following C code?

#include
int main()
{
int i = 10;
int *p = &i;
printf("%d\n", *p++);
}
1. 10
2. 11
3. Garbage value
4. Address of i
What will be the output of the following C code?

#include
void main()
{
int x = 97;
int y = sizeof(x++);
printf("X is %d", x);
}
1. X is 97
2. X is 98
3. X is 99
4. Run time error
What will be the output of the following C code?
#include
void main()
{
int x = 4, y, z;
y = --x;
z = x--;
printf("%d%d%d", x, y, z);
}
1. 3 2 3
2. 2 3 3
3. 3 2 2
4. 2 3 4
What will be the output of the following C code?

#include
void main()
{
int x = 4;
int *p = &x;
int *k = p++;
int r = p - k;
printf("%d", r);
}
1. 4
2. 8
3. 1
4. Run time error
What will be the output of the following C code?

#include
void main()
{
int a = 5, b = -7, c = 0, d;
d = ++a && ++b || ++c;
printf("\n%d%d%d%d", a, b, c, d);
}
1. 6 -6 0 0
2. 6 -5 0 1
3. -6 -6 0 1
4. 6 -6 0 1
What will be the output of the following C code?

#include
void main()
{
int a = -5;
int k = (a++, ++a);
printf("%d\n", k);
}
1. -4
2. -5
3. 4
4. -3

Increment and decrement operators

Quiz