c 语言loop语句,C语言循环语句（C language loop statement）.doc
C语言循环语句(C language loop statement)
C语言循环语句(C language loop statement)
Output for 10 groups per line.
#include
Void, main ()
{int, I, J, flag, k=0;
For (i=500; i<=800; i++)
{flag=1;
For (j=2; j
If (flag==1) {printf ("%5d", "I"); k++;
If (k%10==0) printf ("\n");
}
}
Printf ("\nk=%d\n", K);
}
The second part: break and continue statements
The function of the 1.1.break statement: to end the for statement in this layer.
1.2. example: write function, ask s=1+2+3... Until the value of S is greater than the t end loop, the output s is the value, and the value of T is read through the keyboard.
#include
Void, main ()
{int, I, s=0, t;
Printf (enter the value of T:);
Scanf ("%d", &t);
For (i=1;; i++)
{s+=i;
If (s>t) break;
}
Printf ("i=%d\ns=%d\n", "I", "s");
}
T=8
-- >
I=1, s=1
I=2, s=3
I=3, s=6
I=4, s=10
1.3. nested break statements:
--- write function, output all the prime numbers between 500--800, each line for 10 groups for output.
#include
Void, main ()
{int, I, J, flag, k=0;
For (i=500; i<=800; i++)
{flag=1;
For (j=2; j
If (flag==1) {printf ("%5d", "I"); k++;
If (k%10==0) printf ("\n");
}
}
Printf ("\nk=%d\n", K);
}
2.1, continue statement function: skip the following statements that have not been executed in this layer and proceed to the next cycle.
2.2 example:
#include
Void, main ()
{int, I, s=0, k=0;
For (i=1; i<=5; i++)
{s+=i;
If (s>8), {printf ("****i=%d, s=%d, k=%d\n", I, s, K); continue;}
K+=s;
Printf ("i=%d, s=%d, k=%d\n", I, s, K);
}
}
I=1, s=1, k=1
I=2, s=3, k=4
I=3, s=6, k=10
****i=4, s=10, k=10
****i=5, s=15, k=10
The third part: character input and output
Taking the basic data types in C language: integer, real, character
--- char ch;
Ch>='0'&&ch<='9'
Ch>='A'&&ch<='Z'
Ch>='a'&&ch<='z'
3.1 character inputs and outputs:
(1) call printf and scanf
--printf function:
* * * in the C language, the form character%c is used to implement character output.
Such as:
#include
Void, main ()