string to int c

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Camilla
06 Jan 2021
1atoi(str) is unsafe
2
3This is the prefered method:
4(int)strtol(str, (char **)NULL, 10)
source
Giulia
07 Aug 2018
1int isNumber(char s[])
2{
3    for (int i = 0; s[i]!= '\0'; i++)
4    {
5        if (isdigit(s[i]) == 0)
6              return 0;
7    }
8    return 1;
9}
10
source
Leni
05 Apr 2017
1#include<string>
2string str1 = "45"; 
3string str2 = "3.14159"; 
4string str3 = "31337 geek";
5
6int myint1 = stoi(str1);
7std::cout<<stoi(str1);
Valerio
06 Apr 2018
1const char *number = "10";
2char *end;
3long int value = strtol(number, &end, 10); 
4if (end == number || *end != '\0' || errno == ERANGE)
5    printf("Not a number");
6else
7    printf("Value: %ld", value);
Mirko
21 Jan 2020
1char s[] = "45";
2
3int num = atoi(s);
4
Lucie
26 Aug 2017
1use atoi from the stdlib.h 
2char *string = "hi";
3int x = atoi(string);
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