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1. Find the output for the following C program
main()
{
char *p1=”Name”;
char *p2;
p2=(char *)malloc(20);
while(*p2++=*p1++);
printf(”%s\n”,p2);
}
Ans. An empty string
2. Find the output for the following C program
main()
{
int x=20,y=35;
x = y++ + x++;
y = ++y + ++x;
printf(”%d %d\n”,x,y);
}
Ans. 57 94
3. Find the output for the following C program
main()
{
int x=5;
printf(”%d %d %d\n”,x,x<<2,x>>2);
}
Ans. 5 20 1
4. Find the output for the following C program
#define swap1(a,b) a=a+b;b=a-b;a=a-b;
main()
{
int x=5,y=10;
swap1(x,y);
printf(”%d %d\n”,x,y);
swap2(x,y);
printf(”%d %d\n”,x,y);
}
int swap2(int a,int b)
{
int temp;
temp=a;
b=a;
a=temp;
return;
}
Ans. 10 5
5. Find the output for the following C program
main()
{
char *ptr = “Ramco Systems”;
(*ptr)++;
printf(”%s\n”,ptr);
ptr++;
printf(”%s\n”,ptr);
}
Ans. Samco Systems
6. Find the output for the following C program
#include
main()
{
char s1[]=”Ramco”;
char s2[]=”Systems”;
s1=s2;
printf(”%s”,s1);
}
Ans. Compilation error giving it cannot an modifiable ‘lvalue’
7. Find the output for the following C program
#include
main()
{
char *p1;
char *p2;
p1=(char *) malloc(25);
p2=(char *) malloc(25);
strcpy(p1,”Ramco”);
strcpy(p2,”Systems”);
strcat(p1,p2);
printf(”%s”,p1);
}
Ans. RamcoSystems
8.Find the output for the following C program
main()
{
int x=10,y=15;
x=x++;
y=++y;
printf(”%d %d\n”,x,y);
}
Ans. 11 16

9. Find the output for the following C program
# define TRUE 0
some code
while(TRUE)
{
some code
}
Ans. This won’t go into the loop as TRUE is defined as 0
10. Find the output for the following C program
main()
{
int x=10;
x++;
change_value(x);
x++;
Modify_value();
printf(”First output: %d\n”,x);
}
x++;
change_value(x);
printf(”Second Output : %d\n”,x);
Modify_value(x);
printf(”Third Output : %d\n”,x);
}
Modify_value()
{
return (x+=10);
}
change_value()
{
return(x+=1);
}
Ans. 12 1 1