atoi() is giving me this error: error C2664: 'atoi' : cannot convert parameter 1 from 'char' to 'const char *' Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast from this line: int pid = atoi( token.at(0) ); where token is a vector how can i go around this? ...
I have a big number stored in a string and try to extract a single digit. But what are the differences between those calls? #include <iostream> #include <string> int main(){ std::string bigNumber = "93485720394857230"; char tmp = bigNumber.at(5); int digit = atoi(&tmp); int digit2 = atoi(&bigNumber.at(5)) int digit3...
I'm trying to parse some input on an embedded system. I'm expecting something like this: SET VARNAME=1,2,3,4,5,6,7,8,9,10\0 When I'm converting the separate strings to ints, both atoi() and strtol() seem to be returning 0 if the string begins with 8. Here is my code: char *pch, *name, *vars; signed long value[256]; int i; #ifdef UA...
When using the function atoi (or strtol or similar functions for that matter), how can you tell if the integer conversion failed or if the c-string that was being converted was a 0 (zero)? For what I'm doing zero is an acceptable value and the c-string being converted may contain any number of zeros. It may also have leading whitespace. ...
With the assistance of others, I have redone the code from scratch due to them pointing out numerous errors and things that wouldn't work. Thus I have changed the code massively. I have the program working other than two formatting settings that I can't figure out how to get to work. I need to only print "DAILY SCOOP REPORT" once at ...
I was having some trouble with my parsing function so I put some cout statements to tell me the value of certain variables during runtime, and I believe that atoi is incorrectly converting characters. heres a short snippet of my code thats acting strangely: c = data_file.get(); if (data_index == 50) cout << "50 digit 0 = '" << c <<...
I'm new to the C/C++ game so I assume I'm making a rookie mistake: int main(){ char* clen; clen = getenv("CONTENT_LENGTH"); if (clen==NULL){ cout << "No such ENV var: CONTENT_LENGTH"<<endl; exit(0); } int cl = 0; cl = atoi(clen); if (cl < 1){ return inputPage(); } // if there is no content, we assume tha...
I am trying to read in data from a text file (the time). and convert that into something that can be DiffTime'ed to the current system time. I am now so close to getting this working correctly, I can taste it but I am stuck with an issue I cannot work out. (I have a very basic grasp of the C language). this program reads in the data fr...
Hi, I don't understand why atoi() is working for every entry but the first one. I have the following code to parse a simple .csv file: void ioReadSampleDataUsers(SocialNetwork *social, char *file) { FILE *fp = fopen(file, "r"); if(!fp) { perror("fopen"); exit(EXIT_FAILURE); } char line[BUFSIZ], *word, ...
What's the function to create a int value from string i := ???.????( "10" ) ...
I don't understand the results of the following C code. main() { char s[] = "AAA"; advanceString(s); } void advanceString(p[3]) { int val = atoi(p); printf("The atoi val is %d\n",val); } Here the atoi val is shown as 0. But I could not figure out the exact reason. As per my understanding, it should be the summation of...
I have the following code, m_edit is a MFC CEdit (I know I would never use MFC but project demanded it). It's a simple loop, that gets the text from a text edit, converts it to integer after getting the first line, then stores it in m_y vector. LPTSTR szTemp; vector<int> m_y; for(int i = 0; i < m_edit->GetLineCount(); i++){ szTemp ...
Ok I've been curious about this for a while. In the C language where did they come up with the name atoi for converting a string to an integer? The only thing I can think of is Array To Integer for an acronym but that doesn't really make sense. ...
Is there a way of converting a char into a string in C? I'm trying to do so like this: char *array; array[0] = '1'; int x = atoi(array); printf("%d",x); ...
Hi, i have a NSString instance ,i want to retrieve value from it and store it into an integer. This is wat i am doing but its not working. NSString *totalcnt; char *str = totalcnt; int a = atoi(str); Help me out. Thanks Taimur ...
#include<stdio.h> #include<string.h> #include<stdlib.h> int main(){ int n; int a,b,ans[10000]; char *c,*d,*e; int i = 0; c = (char*)(malloc(20 * sizeof(char))); d = (char*)(malloc(20 * sizeof(char))); scanf("%d",&n); while(i < n){ scanf("%d",&a); scanf("%d",&b); itoa(a,...
If there are non-number characters in a string and you call atoi [I'm assuming wtoi will do the same]. How will atoi treat the string? Lets say for an example I have the following strings: "20234543" "232B" "B" I'm sure that 1 will return the integer 20234543. What I'm curious is if 2 will return "232." [Thats what I need to solve ...
Hi, So as we all probably know, the atoi converts a char to a number. But, what do you do if you only want one of the array elements instead of the whole array? Please look at the following: for (h = 0; h < 5; h++) { num[h] = atoi(temp[h]); } Assume that num is an array of type int and that temp is and array of type char. This g...
Hello, gcc 4.4.4 c89 What is better to convert a string to an integer value. I have tried 2 different methods atoi and sscanf. Both work as expected. char digits[3] = "34"; int device_num = 0; if(sscanf(digits, "%d", &device_num) == EOF) { fprintf(stderr, "WARNING: Incorrect value for device\n"); return FALSE; } or using a...
I wish to take an integer as a command line argument, but if the user passes a non-integer string, this will cause a stack overflow. What is the standard way to ensure atoi() will be successful? ...