53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
/* prog 13-1,................. */
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double area(int),circumf(int);
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double volume(int),surface(int);
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int main(void)
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{
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int r,item;
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printf("(1) ... (2) ...\n");
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printf("(3) .... (4) .....\n");
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printf(".........:");
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do
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scanf("%d",&item);
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while((item>4)||(item<1));
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do
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{
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printf("....:");
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scanf("%d",&r);
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} while(r<=0);
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printf("\n");
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switch (item)
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{
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case 1:printf("..=%d,...=%.2f\n",r,area(r));
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break;
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case 2:printf("..=%d,...=%.2f\n",r,circumf(r));
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break;
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case 3:printf("..=%d,....=%.2f\n",r,volume(r));
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break;
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case 4:printf("..=%d,.....=%.2f\n",r,surface(r));
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}
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return 0;
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}
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double area(int r) /* ....area()...... */
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{
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return (PI*r*r);
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}
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double volume(int r)/* ....volume()....... */
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{
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return (4/3*PI*r*r*r);
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}
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double surface(int r)/* ....surface()........ */
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{
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return (4*PI*r*r);
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}
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double circumf(int r)/* ....circumf()...... */
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{
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return (2*PI*r);
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}
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