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Recent questions tagged pointers

2 votes
2 answers
211
Programming
int main() { static char a[5][20]={"mona","vijay","kumar","Nakuru","suresh"}; int i; char *p; p=a[3]; a[3]=a[4]; a[4]=p; for(i=0;i<=4;i++) printf("%s",a[i]); } which line causes compile time error Nd why
int main() { static char a[5][20]={"mona","vijay","kumar","Nakuru","suresh"}; int i; char *p; p=a[3]; a[3]=a[4]; a[4]=p; for(i=0;i<=4;i++) printf("%s",a[i]); }which line ...
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1 votes
2 answers
212
Progrmming
int main() { int a[5]={1,2,3,4,5}; int *ptr=(int *)(&a+1); // why is typecasting necessary here? It can just be int*ptr=&a+1; printf("%d%d",*(a+1),*(ptr-1)); } 2 5 garbage compiler defined segmentation fault
int main() { int a[5]={1,2,3,4,5}; int *ptr=(int *)(&a+1); // why is typecasting necessary here? It can just be int*ptr=&a+1; printf("%d%d",*(a+1),*(ptr-1)); }2 5garbagec...
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0 votes
2 answers
216
Gate C Programming
What is the Output of following code? void main() { int i=10; int *j; void *k; k=&i; j=&i; k++; j++; printf("Address of j=%u",j); }
What is the Output of following code?void main(){int i=10;int *j;void *k;k=&i;j=&i;k++;j++;printf("Address of j=%u",j);}
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0 votes
1 answer
217
oo c++
What is this pointer? and what is the use of this pointer?
What is this pointer? and what is the use of this pointer?
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2 votes
1 answer
219
Question about variable goes out of scope
void main() { int *ptr; ..... ..... { int ch; ptr = &ch; } ..... // Here ptr is dangling pointer } Since here's no function calling and only main(). So, I am not able to understand which variable is going out of scope? ptr or ch? Thanks all!
void main() { int *ptr; ..... ..... { int ch; ptr = &ch; } ..... // Here ptr is dangling pointer }Since here's no function calling and only main(). So, I am not able to u...
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0 votes
1 answer
220
Question regarding dangling pointer
#include <stdio.h> int*fun() { intx=5; return&x; } int main(){ int*p=fun(); fflush(stdin); printf("%d",*p); return0; } Please explain this code, how's it's working line by line. Thank you!
#include <stdio.h int*fun() { intx=5; return&x; } int main(){ int*p=fun(); fflush(stdin); printf("%d",*p); return0; }Please explain this code, how's it's working line by ...
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2 votes
3 answers
222
program output
char *c[] = {"GeksQuiz", "MCQ", "TEST", "QUIZ"}; char **cp[] = {c+3, c+2, c+1, c}; char ***cpp = cp; int main() { printf("%s ", **++cpp); printf("%s ", *--*++cpp+3); printf("%s ", *cpp[-2]+3); printf("%s ", cpp[-1][-1]+1); return 0; }
char *c[] = {"GeksQuiz", "MCQ", "TEST", "QUIZ"}; char cp[] = {c+3, c+2, c+1, c}; char *cpp = cp; int main() { printf("%s ", ++cpp); printf("%s ", * *++cpp+3); printf("...
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70 votes
13 answers
223
GATE CSE 2017 Set 2 | Question: 55
Consider the following C program. #include<stdio.h> #include<string.h> int main() { char* c="GATECSIT2017"; char* p=c; printf("%d", (int)strlen(c+2[p]-6[p]-1)); return 0; } The output of the program is _______
Consider the following C program.#include<stdio.h #include<string.h int main() { char* c="GATECSIT2017"; char* p=c; printf("%d", (int)strlen(c+2[p]-6[p]-1)); return 0; }T...
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30 votes
11 answers
225
GATE CSE 2017 Set 2 | Question: 14
Consider the following function implemented in C: void printxy(int x, int y) { int *ptr; x=0; ptr=&x; y=*ptr; *ptr=1; printf(“%d, %d”, x, y); } The output of invoking $printxy(1,1)$ is: $0, 0$ $0, 1$ $1, 0$ $1, 1$
Consider the following function implemented in C:void printxy(int x, int y) { int *ptr; x=0; ptr=&x; y=*ptr; *ptr=1; printf(“%d, %d”, x, y); }The output of invoking $...
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1 votes
1 answer
226
Programming Output
Determine the output- #include <stdio.h> int main(void) { char *p="gateoverflow"; *(p+5)='z'; printf("%s",p); return 0; }
Determine the output-#include <stdio.h int main(void) { char *p="gateoverflow"; *(p+5)='z'; printf("%s",p); return 0; }
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1 votes
2 answers
227
C programming
char *x[5] = {"abc","def","ghi","jkl","mno"}; char *y[5] = {"123","456","789","101","102"}; struct hcode { char *word; }hcodes[5]; struct key { int id; char *word; struct hcode *password; } ... ); return 0; } $A.$ 456,hi,01,no $B.$ 456,ghi,101,mno $C.$ 56,hi,01,no $D.$ 456,ef,01,no
char *x[5] = {"abc","def","ghi","jkl","mno"}; char *y[5] = {"123","456","789","101","102"}; struct hcode { char *word; }hcodes[5]; struct key { int id; char *word; struct...
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1 votes
1 answer
228
Multi dimensional array
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5 votes
2 answers
230
C programming
int i=0; char *a = "abcde\0efgh"; while(a[++i]) printf("%d",*++a - 'a'); the output of the above c code segment?
int i=0; char *a = "abcde\0efgh"; while(a[++i]) printf("%d",*++a - 'a');the output of the above c code segment?
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0 votes
1 answer
231
C Programming Doubt
char *p; *p='a' ; I know this will give compiler error but can anyone explain what is the actual bug in this and how to rectify it??
char *p;*p='a' ;I know this will give compiler error but can anyone explain what is the actual bug in this and how to rectify it??
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0 votes
0 answers
232
C Programming
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2 votes
1 answer
233
C programming
#include <stdio.h> int foo(unsigned word) { int n = 0; int num_set_bits[16] = {0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4}; while( word > 0 ) { n += num_set_bits[ word & 0xF ]; word >>= 4; } return n; } int main() { printf("%d\n",foo(0xABC)); return 0; } Output of the above program ?
#include <stdio.h int foo(unsigned word) { int n = 0; int num_set_bits[16] = {0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4}; while( word 0 ) { n += num_set_bits[ word & 0xF ]; word >...
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1 votes
2 answers
234
Doubt
How to read them?? I. int (*a)(); II. int (*a[5])(); III. int *(*a)(); IV. int (*a)() V. int *(*a)[10]
How to read them??I. int (*a)();II. int (*a[5])();III. int *(*a)();IV. int (*a)()V. int *(*a)[10]
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1 votes
1 answer
235
Made easy series
how can int pointer be used to point to string constant??? even if we consider that address was passed to int pointer then when while(*++p1) is executed it must raise error right bcoz we are using int pointer???
how can int pointer be used to point to string constant??? even if we consider that address was passed to int pointer then when while(*++p1) is executed it must raise err...
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0 votes
2 answers
236
Pointers and arrays
#include <stdio.h> int main() { int a[][3] = {1, 2, 3, 4, 5, 6}; int (*ptr)[3] = a; printf("%d %d ", (*ptr)[1], (*ptr)[2]); ++ptr; printf("%d %d\n", (*ptr)[1], (*ptr)[2]); return 0; } (a) 2 3 5 6 (b) 2 3 4 5 (c) 4 5 0 0 (d) none of the above
#include <stdio.h int main() { int a[][3] = {1, 2, 3, 4, 5, 6}; int (*ptr)[3] = a; printf("%d %d ", (*ptr) , (*ptr) ); ++ptr; printf("%d %d\n", (*ptr) , (*ptr) ); return ...
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3 votes
1 answer
237
l and r values ULLMAN Q2.1
which of the following expressions have l-values ? which have r- values a)A[I+1] b)*A c)&A d)&(*A) e)*(&A) f)*(&(&A))
which of the following expressions have l-values ? which have r- valuesa)A[I+1] b)*A c)&Ad)&(*A) e)*(&A) f)*(&(&A))
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3 votes
4 answers
238
Pointers
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3 votes
1 answer
239
c programming
What is the output of the following C program void main( ) { static char a[5][20] = {“Mona”, “Vijay”, “Kumar”, “Ankur”, “Suresh”}; int i; char *p; p = a[3]; a[3] = a[4]; a[4] = p; for(i = 0; i <= 4; i++) printf(“%s”, a[i]); }
What is the output of the following C programvoid main( ){static char a[5][20] = {“Mona”, “Vijay”, “Kumar”, “Ankur”, “Suresh”};int i;char *p;p = a[3];...
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0 votes
0 answers
240
c programming
What is the output of this C code?
What is the output of this C code?
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