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  1. #include <stdio.h>
  2. void cat_data(int *data1, const int *data2, int len2); //プロトタイプ宣言
  3.  
  4. int main(void) {
  5. 	int data1[7]={1,2};
  6. 	int data2[5]={3,4,5,6,7};
  7. 	int len1=sizeof(data1)/sizeof(data1[0]);
  8. 	int len2=sizeof(data2)/sizeof(data2[0]);	//長さを格納
  9.  
  10. 	cat_data(data1,data2,len2); //data1のposにいれる
  11.  
  12. 	for(int i=0;i<7;i++){
  13. 		printf("data1[%d]=%d\n",i,data1[i]);
  14. 	}
  15. 	return 0;
  16. }
  17. void cat_data(int *data1, const int *data2, int len2){
  18. 	 while(*data1){
  19. 	 	data1++;//ポインタをずらす
  20. 	 }
  21. 	 while(len2){
  22. 	 	*data1=*data2;
  23. 	 	data1++;//ポインタをずらす
  24. 	 	data2++;//ポインタをずらす
  25. 	 	len2--;
  26. 	 }
  27.  
  28. }
Success #stdin #stdout 0s 5316KB
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stdin
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Standard input is empty
stdout
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data1[0]=1
data1[1]=2
data1[2]=3
data1[3]=4
data1[4]=5
data1[5]=6
data1[6]=7
https://ideone.com/SeQgOm
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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