48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
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A simple program demonstrating the use of pointers.
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#include <iostream>
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using namespace std;
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int main()
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{
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// declare an integer and a float variable
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int IntNum;
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float FloatNum;
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// declare integer and float pointers
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int *pIntNum;
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float *pFloatNum;
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// initialize the integer and float variables
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IntNum = 10;
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FloatNum = 12.34;
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// store addresses in pointers
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pIntNum = &IntNum;
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pFloatNum = &FloatNum;
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// print out the original values
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cout << "Before increment: " << endl;
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cout << "\t IntNum is: " << IntNum << endl;
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cout << "\t FloatNum is: " << FloatNum << endl;
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// note that we need to dereference a pointer in order
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// to extract the value it contains.
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cout << "\t pIntNum contains: " << *pIntNum << endl;
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cout << "\t pFloatNum contains: " << *pFloatNum << endl;
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// increment values of the integer and float variables
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(*pIntNum)++; // dereference and then increment
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(*pFloatNum)++;
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// print out the values after increment
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cout << "After increment: " << endl;
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cout << "\t IntNum is: " << IntNum << endl;
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cout << "\t FloatNum is: " << FloatNum << endl;
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cout << "\t pIntNum contains: " << *pIntNum << endl;
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cout << "\t pFloatNum contains: " << *pFloatNum << endl;
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return 0;
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}
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