(I did that answer while R 0x… and W 0x… was given on the same line rather than two) If you are sure each line of the file contains R<space>0x…<space>W<space>0x… then you can do int main() { FILE * fp = fopen(“in”, “r”); if (fp == NULL) { puts(“cannot open ‘in'”); return -1; } char … Read more
Point 1: Nested functions are not standard C. They are supported as GCC extension.. Point 2: printf(“&b is:%s\n”,&b); is wrong and invokes UB, because of improper format specifier. You need to change that to printf(“&b is:%p\n”,(void *)&b); Point 3: &(&a) is wrong. the operand for & needs to be an lvalue, not another address, which … Read more
You Could Well Do This First Make a char array , Containing Number Of Maximum Stars that will be asked to print. char stars[] = “***************************************”; Then Ask User Input for number of stars they want to print. int a; printf(“Enter Number of Stars You Want To Print : “); scanf(“%d” , &a); Then You … Read more
I want to have a program in C that reads 3 numbers and prints the bigger one, using only one pointer and no more variables. #include <stdio.h> #include <stdlib.h> int main(void) { int *p; p = malloc(sizeof *p); // assume it worked if (scanf(“%d”, p) != 1) /* error */; // read 1st number printf(“%d\n”, … Read more
I recommend using a C-Style string containing the vowels, then using strchr to search it: const char vowels[] = “aeiou”; const size_t length = strlen(cString); unsigned int vowel_count = 0; for (unsigned int i = 0; i < length; ++i) { if (strchr(vowels, cString[i]) != NULL) { ++vowel_count; } } There are other methods, such … Read more
This code compiles cleanly using GCC 4.8.2 on Mac OS X 10.9.1 Mavericks with the command line: gcc -O3 -g -std=c11 -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes \ -Wold-style-definition -Werror bits.c -o bits Source: #include <math.h> #include <stdio.h> #include <string.h> extern int twosComplement(int number); int twosComplement(int number) { printf(“searching for twos complement of %d\n”, number); int temp … Read more
You need to convert your std::string to a std::uint16_t. I’d recommend a stringstream std::istringstream ss(string); // maybe pick a different name std::uint16_t port{}; ss >> port; address.sin_port = htons(port); Be sure to #include <sstream> 2 solved Passing std::string as parameter gives error – htons function
You should change your if condition. string::find returns the position of the found string or string::npos if no string was found. string::find does not work with true and false. true is converted to 1. Therefor b.find(subString)== true is only true if subString is found at position 1 in b. You can verify this behavior with … Read more
WHere does your string point to? Nowhere! That’s why you have segmentation fault. You have to either allocate variable on stack as array or define it as pointer and later allocate memory using malloc. When using malloc, don’t forget to include “stdlib.h” Either do this: char str[6]; strcpy(str,”C-DAC”); or char *str=malloc(sizeof(*str) * 6); strcpy(str,”C-DAC”); solved … Read more
Exception thrown at 0x0F640E09 (ucrtbased.dll) in ConsoleApplication5.exe: 0xC0000005: Access violation writing location 0x014C3000? solved Exception thrown at 0x0F640E09 (ucrtbased.dll) in ConsoleApplication5.exe: 0xC0000005: Access violation writing location 0x014C3000?
First, “sample” is called a string literal. It declares a const char array terminated with a null character. Let us go on: char arr[]=”sample”; The right hand part in a const char array of size 7 (6 characters and a ‘\0’. The dimension of arr is deduced from its initialization and is also 7. The … Read more
OK if you want to fill your char with ‘b’ character you CAN do it this way char d[7]; int i; for (i = 0; i < 7; i++) { d[i] = ‘b’; } solved initialization of char [] and working with it. I don’t want to use “string” [duplicate]
#include <stdio.h> #include <string.h> int main(void){ char str[]= “/proc/proc hello/foo 4000”; char path[256]; char pid[10]; char *p; p=strrchr(str, ‘ ‘); strcpy(pid, p+1); *p=’\0’; strcpy(path, str); printf(“%s\n”, path);// /proc/proc hello/foo printf(“%s\n”, pid);// 4000 return 0; } 2 solved C Check duplicate string entries