strcat와 및 세그먼트 오류 11

Question

내 코드는 다음과 같다 :

#include<stdio.h> 
    #include <string.h> 
    #include <math.h> 
    #include <stdlib.h> 
    int string_length(char*); 
    void reverse(char*); 
    int main(void) 
    { 
     char num[256]; 
     printf("%c[%d;%d;%dmPlease enter a number of rows: ", 0x1B, 5, 32, 40); 
     gets(num); 
     //gets number 

printf("%c[%dm\n", 0x1B, 0); 
//Resets color 

//Variables 
char revnum[50], q[50] = "\0", r[50] = "\v"; 
int i, x, j, z, w; 

//Reverses inputted character string 
reverse(num); 

//Takes reversed inputted character string and out puts it as an integer 
for(i = 0; num[i] != '\0'; ++i) { 
    j = -(48-num[i]); 
    double y = i; 
    x = j*pow(10, y) + x; 
} 

//Takes integer version of inputted character string and assigns a counter's value (counting up to our integer version) to a character string 
for (z = 0; z <= x; z++) { 
    sprintf(revnum, "%d", z); 

    //Takes the new character string for each number up to the inputted value and prints it vertically, but no differentiating between numbers and printing them horizontally to each other 
    for (w = 0; revnum[w] != '\0'; ++w) { 
     strcat(q, r); 
     printf("%s", q); 
     strcat(q, revnum[w]); 
     } 
    } 

    } 

    //Function which reverses a character string 
    void reverse(char *num) 
{ 
int length, c; 
char *begin, *end, temp; 

length = string_length(num); 

begin = num; 
end = num; 

for (c = 0 ; c < (length - 1) ; c++) 
    end++; 

for (c = 0 ; c < length/2 ; c++) 
{ 
    temp = *end; 
    *end = *begin; 
    *begin = temp; 

    begin++; 
    end--; 
} 
} 

int string_length(char *pointer) 
{ 
int c = 0; 

while(*(pointer+c) != '\0') 
    c++; 

return c; 
} 

프로그램의 포인트는 모든 숫자 자체가 수평으로 나열 수직 각 번호의 숫자와 그 숫자 입력 된 번호 앞에 출력이다 .

도와주세요!

Answer 1

몇 가지 실수를 저질렀습니다. 이 코드는 작동합니다

#include<stdio.h> 
#include <string.h> 
#include <math.h> 
#include <stdlib.h> 
int string_length(char*); 
void reverse(char*); 
int main(void) 
{ 
    char num[256]; 
    printf("Please enter a number of rows: ", 0x1B, 5, 32, 40); 
    gets(num); 
    //gets number 

//Variables 
char revnum[50], q[50] = "\0"; 
int i, x, j, z, w; 

//Reverses inputted character string 
reverse(num); 

//Takes reversed inputted character string and out puts it as an integer 
x = atoi(num); 

//Takes integer version of inputted character string and assigns a counter's value (counting up to our integer version) to a character string 
for (z = 0; z <= x; z++) { 
sprintf(revnum, "%d", z); 

//Takes the new character string for each number up to the inputted value and prints it vertically, but no differentiating between numbers and printing them horizontally to each other 
for (w = 0; revnum[w] != '\0'; ++w) { 
    printf("%s\v", q); 
char a[2]; 
sprintf(a,"%c",revnum[w]); 
strcat(q,a); 
    } 
} 

} 

//Function which reverses a character string 
void reverse(char *num) 
{ 
int length, c; 
char *begin, *end, temp; 

length = string_length(num); 

begin = num; 
end = num; 

for (c = 0 ; c < (length - 1) ; c++) 
end++; 

for (c = 0 ; c < length/2 ; c++) 
{ 
temp = *end; 
*end = *begin; 
*begin = temp; 

begin++; 
end--; 
} 
} 

int string_length(char *pointer) 
{ 
int c = 0; 

while(*(pointer+c) != '\0') 
c++; 

return c; 
} 

을 그리고 스택 smaching 탐지를 방지하기 위해 옵션 -fno-스택 보호로 컴파일합니다.