Is it possible to do multiple operations in increment part of for loop in C/C++?

c++ c for-loop block
Luka Tiger picture Luka Tiger · Oct 8, 2013 · Viewed 12.8k times · Source

Is it possible to do multiple operations in increment part of for loop in C/C++? Something like this:

int a = 0, b = 0, c = 5;
for(; a < c; increase a by 1 and increase b by 2)

Answer

0x499602D2 picture 0x499602D2 · Oct 8, 2013

Use the comma operator:

for (; a < c; ++a, b += 2)

Related questions

Post-increment and pre-increment within a 'for' loop produce same output

The following for loops produce identical results even though one uses post increment and the other pre-increment. Here is the code: for(i=0; i<5; i++) { printf("%d", i); } for(i=0; i<5; ++i) { printf("%d", i); } I get the …

Read More
Why Is Comparing if an Unsigned Int >= 0 a "Pointless Comparison"?

I got warning: Pe186 "Pointless comparison of unsigned int with zero" when I tried to compile the following code: for(clLoop = cpLoopStart; clLoop >= 0; clLoop--) { //Do something } I don't understand why. I could understand, if I were looking for a …

Read More
Is there a technical reason to use > (<) instead of != when incrementing by 1 in a 'for' loop?

I almost never see a for loop like this: for (int i = 0; 5 != i; ++i) {} Is there a technical reason to use > or < instead of != when incrementing by 1 in a for loop? Or this is more of a convention?

Read More