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struct Point{
int x;
int y;
}
Point* pt;
pt = (Point*)malloc(10 * sizeof(Point));
//do sth
free(pt);
然后就可以用下标来操作了
pt[0].x = 12;#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
struct emp {
char name[10];
float salary;
};
int main() {
struct emp *array_emp;
int i;
array_emp=(struct emp *)malloc(1000000*sizeof(struct emp));
if (NULL==array_emp) {
printf("Can not malloc 1000000 emp!\n");
return 1;
}
for (i=0;i<1000000;i+=10000) {
sprintf(array_emp[i].name,"%d",i);
array_emp[i].salary=(float)i;
}
for (i=0;i<1000000;i+=10000) {
printf("%d %s %f\n",i,array_emp[i].name,array_emp[i].salary);
}
free(array_emp);
return 0;
}
//0 0 0.000000
//10000 10000 10000.000000
//20000 20000 20000.000000
//30000 30000 30000.000000
//40000 40000 40000.000000
//50000 50000 50000.000000
//60000 60000 60000.000000
//70000 70000 70000.000000
//80000 80000 80000.000000
//90000 90000 90000.000000
//100000 100000 100000.000000
//110000 110000 110000.000000
//120000 120000 120000.000000
//130000 130000 130000.000000
//140000 140000 140000.000000
//150000 150000 150000.000000
//160000 160000 160000.000000
//170000 170000 170000.000000
//180000 180000 180000.000000
//190000 190000 190000.000000
//200000 200000 200000.000000
//210000 210000 210000.000000
//220000 220000 220000.000000
//230000 230000 230000.000000
//240000 240000 240000.000000
//250000 250000 250000.000000
//260000 260000 260000.000000
//270000 270000 270000.000000
//280000 280000 280000.000000
//290000 290000 290000.000000
//300000 300000 300000.000000
//310000 310000 310000.000000
//320000 320000 320000.000000
//330000 330000 330000.000000
//340000 340000 340000.000000
//350000 350000 350000.000000
//360000 360000 360000.000000
//370000 370000 370000.000000
//380000 380000 380000.000000
//390000 390000 390000.000000
//400000 400000 400000.000000
//410000 410000 410000.000000
//420000 420000 420000.000000
//430000 430000 430000.000000
//440000 440000 440000.000000
//450000 450000 450000.000000
//460000 460000 460000.000000
//470000 470000 470000.000000
//480000 480000 480000.000000
//490000 490000 490000.000000
//500000 500000 500000.000000
//510000 510000 510000.000000
//520000 520000 520000.000000
//530000 530000 530000.000000
//540000 540000 540000.000000
//550000 550000 550000.000000
//560000 560000 560000.000000
//570000 570000 570000.000000
//580000 580000 580000.000000
//590000 590000 590000.000000
//600000 600000 600000.000000
//610000 610000 610000.000000
//620000 620000 620000.000000
//630000 630000 630000.000000
//640000 640000 640000.000000
//650000 650000 650000.000000
//660000 660000 660000.000000
//670000 670000 670000.000000
//680000 680000 680000.000000
//690000 690000 690000.000000
//700000 700000 700000.000000
//710000 710000 710000.000000
//720000 720000 720000.000000
//730000 730000 730000.000000
//740000 740000 740000.000000
//750000 750000 750000.000000
//760000 760000 760000.000000
//770000 770000 770000.000000
//780000 780000 780000.000000
//790000 790000 790000.000000
//800000 800000 800000.000000
//810000 810000 810000.000000
//820000 820000 820000.000000
//830000 830000 830000.000000
//840000 840000 840000.000000
//850000 850000 850000.000000
//860000 860000 860000.000000
//870000 870000 870000.000000
//880000 880000 880000.000000
//890000 890000 890000.000000
//900000 900000 900000.000000
//910000 910000 910000.000000
//920000 920000 920000.000000
//930000 930000 930000.000000
//940000 940000 940000.000000
//950000 950000 950000.000000
//960000 960000 960000.000000
//970000 970000 970000.000000
//980000 980000 980000.000000
//990000 990000 990000.000000
//