Makefile_各自的可执行文件 _0228

//Makefile

#如果每个.c文件中都含有main函数，使用Makefile，可直接生成与之对应的可执行文件，不需要生成中间过程文件

src = $(wildcard *.c)
targets = $(patsubst %.c, %, $(src))

CC = gcc
CFLAGS = -Wall -g

all:$(targets)
$(targets):%:%.c
    $(CC) $(CFLAGS) $< -o $@
clean:
    rm $(targets)
.PHONY:clean

//add.c

#include <stdio.h>

int add(int a, int b)
{
    return a + b;
}

int main(int argc, const char *argv[])
{
    int a,b;
    printf("a b:");
    scanf("%d %d", &a, &b);
    printf("add= %d\n",add(a, b));
    return 0;
}

//sub.c

#include <stdio.h>

int sub(int a, int b)
{
    return a - b;
}

int main(int argc, const char *argv[])
{
    int a,b;
    printf("a b:");
    scanf("%d %d", &a, &b);
    printf("sub= %d\n",sub(a, b));
    return 0;
}