Why we use do-while loop in c?

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Why we use do-while loop in c?

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It is also called as post tested loop It is used when it is necessary to execute the loop at least one time Syntax: do { Loop body } while (Expression); Example: int main(){ int num,i=0; do{ printf("To enter press 1\n"); printf("To exit press 2"); scanf("%d",&num); ++i; switch(num){ case 1:printf("You are welcome\n");break; default : exit(0); } } while(i<=10); return 0; } Output: 3 3 4 4

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1. Write a c program to create dos command type.

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2. What will be output when you will execute following c code? #include enum actor { SeanPenn=5, AlPacino=-2, GaryOldman, EdNorton }; void main() { enum actor a=0; switch(a) { case SeanPenn: printf("Kevin Spacey"); break; case AlPacino: printf("Paul Giamatti"); break; case GaryOldman:printf("Donald Shuterland"); break; case EdNorton: printf("Johnny Depp"); } }
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A. Kevin Spacey
B. Paul Giamatti
C. Donald Shuterland
D. Johnny Depp

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3. What will be output of following c code? void main() { struct bitfield { unsigned a:5; unsigned c:5; unsigned b:6; }bit; char *p; struct bitfield *ptr,bit1={1,3,3}; p=&bit1; p++; clrscr(); printf("%d",*p); getch(); }

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4. What will be output of following c code? #include int main() { int i; for(i=10;i<=15;i++){ while(i){ do{ printf("%d ",1); if(i>1) continue; }while(0); break; } } return 0; }

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