c - how to convert a double value into scientific notation and store it in a string -

this question has answer here:

• correct format specifier double in printf 7 answers

i know while printing can convert regular number scientific notation using %e , there way convert scientific notation , store in string . can same string converted decimal notation ?

i intend convert , print number entered user scientific notation , add entered number , display final result . entered numbers in decimal notation , output in scientific notation.

yes, there sprintf(), , snprintf() this

char string[100]; int result; double value; value = 1e-3; result = snprintf(string, sizeof(string), "%e", value); if ((result < 0) || (result >= sizeof(string)))     error_please_dont_use_string(); // return or else     fprintf(stdout, "%s\n", string);