void f1()                                                                                                                                  
{
	for(int i = 0;i<10000;i++)
	{   
		int f = 0;
		f++;
	}   
}
void f2()
{
	for(int i = 0;i<20000;i++)
	{   
		int f = 0;
		f++;
	}   
}
int main(int argc, char** argv) 
{
	for(int i = 0;i<10000;i++)
	{   
		f1();
		f2();
		f2();
	}   
	return 0;
}

g++ main.c -pg -g
./a.out
gprof ./a.out

index % time    self  children    called     name
												 <spontaneous>
[1]    100.0    0.00    1.79                 main [1]
				1.44    0.00   20000/20000       f2() [2]
				0.35    0.00   10000/10000       f1() [3]
-----------------------------------------------
				1.44    0.00   20000/20000       main [1]
[2]     80.4    1.44    0.00   20000         f2() [2]
-----------------------------------------------
				0.35    0.00   10000/10000       main [1]
[3]     19.6    0.35    0.00   10000         f1() [3]
-----------------------------------------------

void f1()
{
	int f = 0;
	f++;
}
void f2()
{
	int f = 0;
	f++;
}

int main(int argc, char** argv) 
{
	if(argc > 1)
	{
		f1();
	}
	else
	{
		f2();
	}
	return 0;                                                                                                                              
}

gcc main.c -fprofile-arcs -ftest-coverage
./a.out
gcov main.c

	-:    0:Source:main.c                                                                                                              
	-:    0:Graph:main.gcno
	-:    0:Data:main.gcda
	-:    0:Runs:1
	-:    0:Programs:1
#####:    1:void f1()
	-:    2:{ 
#####:    3:    int f = 0;
#####:    4:    f++;
#####:    5:} 
	1:    6:void f2()
	-:    7:{ 
	1:    8:    int f = 0;
	1:    9:    f++;
	1:   10:}
	-:   11: 
	1:   12:int main(int argc, char** argv) 
	-:   13:{
	1:   14:    if(argc > 1)
	-:   15:    {   
#####:   16:        f1();
	-:   17:    }   
	-:   18:    else
	-:   19:    {   
	1:   20:        f2();
	-:   21:    }   
	1:   22:    return 0;
	-:   23:}