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tech:tutorial:c_pointer_cheatsheet
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| Both sides previous revision Previous revision | |||
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tech:tutorial:c_pointer_cheatsheet [2016/12/07 23:46] rk4n3 |
tech:tutorial:c_pointer_cheatsheet [2016/12/07 23:52] (current) rk4n3 |
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| Line 13: | Line 13: | ||
| int main( int argc, char *argv[]) { | int main( int argc, char *argv[]) { | ||
| - | int *pVal=0L; // Pointer to an int, address is 0 (null) | + | int iVal=2; // Regular int, set to 2 |
| - | pVal = new int; // pVal now holds address of allocated int | + | int *pVal = &iVal; // Pointer to an int, holds address of iVal |
| - | *pVal = 2; // The memory pVal points (an int) now has value 2 | + | |
| - | int iVal = *pVal; // iVal set to value of int pVal points to | + | |
| char cX='E'; // Regular char (1 byte) set to the character 'E' | char cX='E'; // Regular char (1 byte) set to the character 'E' | ||
| Line 35: | Line 33: | ||
| Info *pData = &aData; // Pointer to an Info, holds address of aData | Info *pData = &aData; // Pointer to an Info, holds address of aData | ||
| aData.iMin = 0; // aData's iMin field is set to 0 | aData.iMin = 0; // aData's iMin field is set to 0 | ||
| - | pData->iMax = 4; // iMax of instance pData points to (aData) is now 4 | + | pData->iMax = *pVal; // iMax of instance pData points to (aData) is now 2 |
| // String in sTxt ("Ed") copied into aData's sName | // String in sTxt ("Ed") copied into aData's sName | ||
| strcpy( pData->sName, sTxt); | strcpy( pData->sName, sTxt); | ||
tech/tutorial/c_pointer_cheatsheet.1481175985.txt.gz · Last modified: 2016/12/07 23:46 by rk4n3
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