C程序设计语言（K&R） 笔记1

#include <stdio.h>

int transformTemprature(int F){
        //`C=(5/9)(?`F-32)
        return (int)(5 * (F-32) / 9);
}

int main(){

        int lower = 0;
        int upper = 300;
        int step = 20;

        for(int f=lower; f<=upper; f+=step){
                printf("%d   %d\n",f,transformTemprature(f));
        }

        return 0;
} 

lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ vim Temprature.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ cc -std=gnu99 Temprature.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ a.out
0  -17
20  -6
40  4
60  15
80  26
100  37
120  48
140  60
160  71
180  82
200  93
220  104
240  115
260  126
280  137
300  148


修改为
                printf("%d\t%d\n",f,transformTemprature(f));
加入制表符 \t

lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ vim Temprature.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ cc -std=gnu99 Temprature.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ a.out
0    -17
20    -6
40    4
60    15
80    26
100    37
120    48
140    60
160    71
180    82
200    93
220    104
240    115
260    126
280    137
300    148

修改为
                printf("%3d%3d\n",f,transformTemprature(f));
右对齐

lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ vim Temprature.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ cc -std=gnu99 Temprature.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ a.out
  0    -17
 20     -6
 40      4
 60     15
 80     26
100     37
120     48
140     60
160     71
180     82
200     93
220    104
240    115
260    126
280    137
300    148

#include <stdio.h>


float transformTemprature(int F){
        //`C=(5/9)(?`F-32)
        return (5.0/9.0) * (F-32.0);
}

int main(){

        float lower = 0;
        float upper = 300;
        float step = 20;

        for(float f=lower; f<=upper; f+=step){
                printf("%3.0f%6.1f\n",f,transformTemprature(f));
        }

        return 0;
} 

lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ vim TempratureFloat.c
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ cc -std=gnu99 TempratureFloat.c 
lenovo-myc@lenovomyc-Lenovo-Product:~/C_test$ a.out
  0 -17.8
 20  -6.7
 40   4.4
 60  15.6
 80  26.7
100  37.8
120  48.9
140  60.0
160  71.1
180  82.2
200  93.3
220 104.4
240 115.6
260 126.7
280 137.8
300 148.9

#include <stdio.h>

float transformTemprature(int F){
        //`C=(5/9)(?`F-32)
        return (5.0/9.0) * (F-32.0);
}

int main(){

        for(int f=0; f<=300; f+=20){
                printf("%3d%6.1f\n",f,transformTemprature(f));
        }

        return 0;
}

#include <stdio.h>

#define LOWWER 0 　　/* lower limit of table */
#define UPPER 300　　/* upper limit */
#define STEP 20　　　/* step size */

float transformTemperature(int f){
        return (5.0/9.0) * (f - 32.0);
}

/* print Fahrenheit-Celsius table */
int main(){

        for(int f=LOWWER; f<=UPPER; f+=STEP){
                printf("%3d%6.1f\n",f,transformTemperature(f));
        }

        return 0;
}