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How can I convert string to double in C/C++?
Here is an example to convert a string to double.
Example
#include <iostream>
using namespace std;
int main() {
char s[20] = "18.2894 is a number";
char *p;
double result;
result = strtod(s, &p);
cout<<"The number after conversion of string : "<<result;
return(0);
}Output
The number after conversion of string : 18.289400
In the above program, a char type array s[20] is declared which is initialized with a alphanumeric characters. The function strtod() is used to convert that string into a double number.
char s[20] = "18.2894 is a number"; char *p; double result; result = strtod(s, &p);
Updated on: 26-Jun-2020
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