Author: Embarcadero USA
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Technical Information Database TI2203C.txt Convert Hex String to an Integer Value. Category :General Platform :All Product :C/C++ All Description: This document provides a method to read hexadecimal numbers. The atoi() function ignores the A-F digits in a hexadecimal number. In fact, the first non-digit character in the string passed to atoi() ends the conversion. The following example converts a four-character text string that represents a hexadecimal number into an integer. It can be used as a template to create other ASCII-to-number conversions. The example code defines a CC++ function called axtoi() that does the conversion. It includes a short main() that to test the function. #include int axtoi(char *hexStg) { int n = 0; // position in string int m = 0; // position in digit[] to shift int count; // loop index int intValue = 0; // integer value of hex string int digit[5]; // hold values to convert while (n 0x29 && hexStg[n] ='a' && hexStg[n] ='A' && hexStg[n] <<<<'s Evaluate|Modify. dialog you can and see how the ANDs, ORs, and shifts work to find the value of each character in the string. CAVEATS ======= N/A BIBLIOGRAPHY ============ N/A Reference: 7/2/98 10:40:41 AM |
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