51 lines
683 B
C
51 lines
683 B
C
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// function to add, sub without using the operators
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#include <stdio.h>
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// Prototypes
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int add(int, int);
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int sub(int, int);
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int main() {
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int a, b;
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printf("Enter two integers\n");
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scanf("%d %d", &a, &b);
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int s,d;
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d = add(a,b);
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s = sub(a,b);
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printf("%d %d",s,d); // output 2 and 10
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return 0;
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}
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// function to add
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int add(int a, int b)
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{
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int c = 0; //carry
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while(b !=0)
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{
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c = a&b;
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a = a^b;
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b = c<<1;
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}
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return a;
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}
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// function to sub
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int sub(int a, int b)
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{
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int s,d;
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d = add((~b),1);
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s = add(a,d);
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return s;
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} // subtraction is addition in disguise (just flip the subtracting term and that's what this function does.)
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